The Experts below are selected from a list of 5871 Experts worldwide ranked by ideXlab platform
Yi Cui - One of the best experts on this subject based on the ideXlab platform.
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nickel impurities in the Solid Electrolyte Interphase of lithium metal anodes revealed by cryogenic electron microscopy
Cell Reports Physical Science, 2020Co-Authors: Rafael A Vila, Yi Cui, William HuangAbstract:Summary Dissolution of transition metals from high-voltage cathodes and their incorporation into the Solid-Electrolyte Interphase (SEI) of carbonaceous anodes drastically reduces the lifetime of Li-ion batteries. The effects of dissolved transition metals on the performance of carbonaceous anodes are well characterized; however, the impact on Li-metal anode performance and the SEI is rarely considered. Here, we use cryogenic electron microscopy to reveal the impact of dissolved Ni on the SEI formation process on Li-metal. A link between Ni incorporation into the SEI and the failure of Li-metal batteries is established. We find that Ni is reduced into its metallic state and incorporates as small clusters into the SEI, locally changing the chemistry and nanostructure of the SEI. These chemical and nanostructure changes locally modify the Li-ion and electron transport properties of the SEI, accelerating Electrolyte decomposition, increasing formation of “dead” Li, and ultimately causing failure.
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dynamic structure and chemistry of the silicon Solid Electrolyte Interphase visualized by cryogenic electron microscopy
Matter, 2019Co-Authors: William Huang, Yi Cui, David T Boyle, Jiangyan Wang, Michael R Braun, Zewen Zhang, Paul C McintyreAbstract:Summary The commercialization of the silicon (Si) anode has been hindered by the instability of its Solid-Electrolyte Interphase (SEI), yet a comprehensive understanding of SEI properties remains underdeveloped owing to the challenge of characterizing this nanoscale passivation layer. In this work, we visualize the structure and chemistry of the SEI on silicon anodes using atomic-resolution cryogenic (scanning) transmission electron microscopy (cryo-(S)TEM) and electron energy loss spectroscopy (EELS), revealing its evolution over the first cycle. We discover the origin of the Si SEI instability in ethylene carbonate (EC) Electrolytes, owing to the high reversibility of the SEI. The role of the critical Electrolyte additive fluoroethylene carbonate is revealed, which extends the cyclability of the Si anode through deposition of an electrochemically irreversible polycarbonate layer on the anode surface. These findings provide a nuanced view into the Si anode instability in commercial EC-based Electrolytes and the role of additives for SEI stabilization.
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lithium metal stripping beneath the Solid Electrolyte Interphase
Proceedings of the National Academy of Sciences of the United States of America, 2018Co-Authors: Feifei Shi, Jin Xie, Yi Cui, Allen Pei, David T Boyle, Xiaokun ZhangAbstract:Lithium stripping is a crucial process coupled with lithium deposition during the cycling of Li metal batteries. Lithium deposition has been widely studied, whereas stripping as a subsurface process has rarely been investigated. Here we reveal the fundamental mechanism of stripping on lithium by visualizing the interface between stripped lithium and the Solid Electrolyte Interphase (SEI). We observed nanovoids formed between lithium and the SEI layer after stripping, which are attributed to the accumulation of lithium metal vacancies. High-rate dissolution of lithium causes vigorous growth and subsequent aggregation of voids, followed by the collapse of the SEI layer, i.e., pitting. We systematically measured the lithium polarization behavior during stripping and find that the lithium cation diffusion through the SEI layer is the rate-determining step. Nonuniform sites on typical lithium surfaces, such as grain boundaries and slip lines, greatly accelerated the local dissolution of lithium. The deeper understanding of this buried interface stripping process provides beneficial clues for future lithium anode and Electrolyte design.
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An Artificial Solid Electrolyte Interphase with High Li-Ion Conductivity, Mechanical Strength, and Flexibility for Stable Lithium Metal Anodes
Advanced Materials, 2017Co-Authors: Yayuan Liu, Pak Yan Yuen, Dingchang Lin, Reinhold H. Dauskardt, Jin Xie, Kai Liu, Yi CuiAbstract:An artificial Solid Electrolyte Interphase (SEI) is demonstrated for the efficient and safe operation of a lithium metal anode. Composed of lithium-ion-conducting inorganic nanoparticles within a flexible polymer binder matrix, the rationally designed artificial SEI not only mechanically suppresses lithium dendrite formation but also promotes homogeneous lithium-ion flux, significantly enhancing the efficiency and cycle life of the lithium metal anode.
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artificial Solid Electrolyte Interphase protected lixsi nanoparticles an efficient and stable prelithiation reagent for lithium ion batteries
Journal of the American Chemical Society, 2015Co-Authors: Jie Zhao, Dingchang Lin, Yi Cui, Haotian Wang, Wei Liu, Hyunwook Lee, Kai Yan, Denys Zhuo, Nian LiuAbstract:Prelithiation is an important strategy to compensate for lithium loss in lithium-ion batteries, particularly during the formation of the Solid Electrolyte Interphase (SEI) from reduced Electrolytes in the first charging cycle. We recently demonstrated that LixSi nanoparticles (NPs) synthesized by thermal alloying can serve as a high-capacity prelithiation reagent, although their chemical stability in the battery processing environment remained to be improved. Here we successfully developed a surface modification method to enhance the stability of LixSi NPs by exploiting the reduction of 1-fluorodecane on the LixSi surface to form a continuous and dense coating through a reaction process similar to SEI formation. The coating, consisting of LiF and lithium alkyl carbonate with long hydrophobic carbon chains, serves as an effective passivation layer in the ambient environment. Remarkably, artificial-SEI-protected LixSi NPs show a high prelithiation capacity of 2100 mA h g–1 with negligible capacity decay in ...
Yu-guo Guo - One of the best experts on this subject based on the ideXlab platform.
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micromechanism in all Solid state alloy metal batteries regulating homogeneous lithium precipitation and flexible Solid Electrolyte Interphase evolution
Journal of the American Chemical Society, 2021Co-Authors: Jing Wan, Yang Shi, Yu-guo Guo, Yuexian Song, Wanping Chen, Huijuan Guo, Yujie Guo, Jilei Shi, Feifei Jia, Fuyi WangAbstract:Sulfide-based Solid-state Electrolytes (SSEs) matched with alloy anodes are considered as promising candidates for application in all-Solid-state batteries (ASSBs) to overcome the bottlenecks of the lithium (Li) anode. However, an understanding of the dynamic electrochemical processes on alloy anode in SSE is still elusive. Herein, in situ atomic force microscopy gives insights into the block-formation and stack-accumulation behaviors of Li precipitation on an Li electrode, uncovering the morphological evolution of nanoscale Li deposition/dissolution in ASSBs. Furthermore, two-dimensional Li-indium (In) alloy lamellae and the homogeneous Solid Electrolyte Interphase (SEI) shell on the In electrode reveal the precipitation mechanism microscopically regulated by the alloy anode. The flexible and wrinkle-structure SEI shell further enables the electrode protection and inner Li accommodation upon cycles, elucidating the functional influences of SEI shell on the cycling behaviors. Such on-site tracking of the morphological evolution and dynamic mechanism provide an in-depth understanding and thus benefit the optimizations of alloy-based ASSBs.
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interfacial evolution of lithium dendrites and their Solid Electrolyte Interphase shells of quasi Solid state lithium metal batteries
Angewandte Chemie, 2020Co-Authors: Yang Shi, Rui Wen, Yu-guo Guo, Jing Wan, Guixian Liu, Tongtong Zuo, Yuexian Song, Bing Liu, Li Jun WanAbstract:Unstable electrode/Solid-state Electrolyte interfaces and internal lithium dendrite penetration hamper the applications of Solid-state lithium-metal batteries (SSLMBs), and the underlying mechanisms are not well understood. Herein, in situ optical microscopy provides insights into the lithium plating/stripping processes in a gel polymer Electrolyte and reveals its dynamic evolution. Spherical lithium deposits evolve into moss-like and branch-shaped lithium dendrites with increasing current densities. Remarkably, the on-site-formed Solid Electrolyte Interphase (SEI) shell on the lithium dendrite is distinctly captured after lithium stripping. Inducing an on-site-formed SEI shell with an enhanced modulus to wrap the lithium precipitation densely and uniformly can regulate dendrite-free behaviors. An in-depth understanding of lithium dendrite evolution and its functional SEI shell will aid in the optimization of SSLMBs.
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A Flexible Solid Electrolyte Interphase Layer for Long-Life Lithium Metal Anodes
Angewandte Chemie - International Edition, 2018Co-Authors: Nian Wu Li, Ya Xia Yin, Rui Wen, Xian Xiang Zeng, Jin Yi Li, Li Jun Wan, Cong-ju Li, Yang Shi, Yu-guo GuoAbstract:Lithium (Li) metal is a promising anode material for high-energy density batteries. However, the unstable and static Solid Electrolyte Interphase (SEI) can be destroyed by the dynamic Li plating/stripping behavior on the Li anode surface, leading to side reactions and Li dendrites growth. Herein, we design a smart Li polyacrylic acid (LiPAA) SEI layer high elasticity to address the dynamic Li plating/stripping processes by self-adapting interface regulation, which is demonstrated by in situ AFM. With the high binding ability and excellent stability of the LiPAA polymer, the smart SEI can significantly reduce the side reactions and improve battery safety markedly. Stable cycling of 700 h is achieved in the LiPAA-Li/LiPAA-Li symmetrical cell. The innovative strategy of self-adapting SEI design is broadly applicable, providing opportunities for use in Li metal anodes
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Synergism of Al-containing Solid Electrolyte Interphase layer and Al-based colloidal particles for stable lithium anode
Nano Energy, 2017Co-Authors: Huan Ye, Ya Xia Yin, Rui Wen, Xian Xiang Zeng, Shuai Feng Zhang, Yang Shi, Lin Liu, Yu-guo Guo, Li Jun WanAbstract:Trace water in nonaqueous Electrolytes has been supposed to be detrimental to Li metal, which may induce formation of HF and corrode battery materials. Herein, we propose that a controllable AlCl3 is an efficient Electrolyte additive for dendrite-free Li deposition. The additive could react with trace water in the Electrolyte to form a stable Al2O3-rich Solid Electrolyte Interphase (SEI) layer on the surface of Li and Al-based positively charged colloidal particles (PCCPs) in the Electrolyte. PCCPs could form a positively charged electrostatic shield around the protruding lithium during the deposition process and induce the subsequent deposition of Li to the adjacent regions of the protruding Li, enabling a uniform and dendrite-free Li morphology. The assembled Li|Se and Li|Li4Ti5O12 batteries benefit from the synergism of SEI layer and PCCPs, thereby demonstrating the impressive capability for dendrite suppression of Li anode and improved electrochemical performance.
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an artificial Solid Electrolyte Interphase layer for stable lithium metal anodes
Advanced Materials, 2016Co-Authors: Ya Xia Yin, Chunpeng Yang, Yu-guo GuoAbstract:A Li3PO4 Solid Electrolyte Interphase (SEI) layer is demonstrated to be stable in the organic Electrolyte, even during the Li deposition/dissolution process. Thus, the Li-conducting Li3PO4 SEI layer with a high Young's modulus can effectively reduce side reactions between Li metal and the Electrolyte and can restrain Li dendrite growth in lithium-metal batteries during cycling.
Donghai Wang - One of the best experts on this subject based on the ideXlab platform.
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polymer inorganic Solid Electrolyte Interphase for stable lithium metal batteries under lean Electrolyte conditions
Nature Materials, 2019Co-Authors: Yue Gao, Qingquan Huang, Seong H Kim, Zhifei Yan, Jennifer L Gray, Daiwei Wang, Tianhang Chen, Haiying Wang, Thomas E Mallouk, Donghai WangAbstract:The Solid–Electrolyte Interphase (SEI) is pivotal in stabilizing lithium metal anodes for rechargeable batteries. However, the SEI is constantly reforming and consuming Electrolyte with cycling. The rational design of a stable SEI is plagued by the failure to control its structure and stability. Here we report a molecular-level SEI design using a reactive polymer composite, which effectively suppresses Electrolyte consumption in the formation and maintenance of the SEI. The SEI layer consists of a polymeric lithium salt, lithium fluoride nanoparticles and graphene oxide sheets, as evidenced by cryo-transmission electron microscopy, atomic force microscopy and surface-sensitive spectroscopies. This structure is different from that of a conventional Electrolyte-derived SEI and has excellent passivation properties, homogeneity and mechanical strength. The use of the polymer–inorganic SEI enables high-efficiency Li deposition and stable cycling of 4 V Li|LiNi0.5Co0.2Mn0.3O2 cells under lean Electrolyte, limited Li excess and high capacity conditions. The same approach was also applied to design stable SEI layers for sodium and zinc anodes. Solid–Electrolyte Interphase is crucial for stabilizing lithium metal anodes for rechargeable batteries. A molecular-level design using a reactive polymer composite is now shown to effectively construct a stable SEI layer and suppress Electrolyte consumption upon cycling.
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organosulfide plasticized Solid Electrolyte Interphase layer enables stable lithium metal anodes for long cycle lithium sulfur batteries
Nature Communications, 2017Co-Authors: Yue Gao, Qingquan Huang, Shuru Chen, Seong H Kim, Donghai WangAbstract:Lithium metal is a promising anode candidate for the next-generation rechargeable battery due to its highest specific capacity (3860 mA h g−1) and lowest potential, but low Coulombic efficiency and formation of lithium dendrites hinder its practical application. Here, we report a self-formed flexible hybrid Solid-Electrolyte Interphase layer through co-deposition of organosulfides/organopolysulfides and inorganic lithium salts using sulfur-containing polymers as an additive in the Electrolyte. The organosulfides/organopolysulfides serve as “plasticizer” in the Solid-Electrolyte Interphase layer to improve its mechanical flexibility and toughness. The as-formed robust Solid-Electrolyte Interphase layers enable dendrite-free lithium deposition and significantly improve Coulombic efficiency (99% over 400 cycles at a current density of 2 mA cm−2). A lithium-sulfur battery based on this strategy exhibits long cycling life (1000 cycles) and good capacity retention. This study reveals an avenue to effectively fabricate stable Solid-Electrolyte Interphase layer for solving the issues associated with lithium metal anodes. The practical application of lithium metal anodes suffers from the poor Coulombic efficiency and growth of lithium dendrites. Here, the authors report an approach to enable the self-formation of stable and flexible Solid-Electrolyte Interphase layers which serve to address both issues.
Ya Xia Yin - One of the best experts on this subject based on the ideXlab platform.
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A Flexible Solid Electrolyte Interphase Layer for Long-Life Lithium Metal Anodes
Angewandte Chemie - International Edition, 2018Co-Authors: Nian Wu Li, Ya Xia Yin, Rui Wen, Xian Xiang Zeng, Jin Yi Li, Li Jun Wan, Cong-ju Li, Yang Shi, Yu-guo GuoAbstract:Lithium (Li) metal is a promising anode material for high-energy density batteries. However, the unstable and static Solid Electrolyte Interphase (SEI) can be destroyed by the dynamic Li plating/stripping behavior on the Li anode surface, leading to side reactions and Li dendrites growth. Herein, we design a smart Li polyacrylic acid (LiPAA) SEI layer high elasticity to address the dynamic Li plating/stripping processes by self-adapting interface regulation, which is demonstrated by in situ AFM. With the high binding ability and excellent stability of the LiPAA polymer, the smart SEI can significantly reduce the side reactions and improve battery safety markedly. Stable cycling of 700 h is achieved in the LiPAA-Li/LiPAA-Li symmetrical cell. The innovative strategy of self-adapting SEI design is broadly applicable, providing opportunities for use in Li metal anodes
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Synergism of Al-containing Solid Electrolyte Interphase layer and Al-based colloidal particles for stable lithium anode
Nano Energy, 2017Co-Authors: Huan Ye, Ya Xia Yin, Rui Wen, Xian Xiang Zeng, Shuai Feng Zhang, Yang Shi, Lin Liu, Yu-guo Guo, Li Jun WanAbstract:Trace water in nonaqueous Electrolytes has been supposed to be detrimental to Li metal, which may induce formation of HF and corrode battery materials. Herein, we propose that a controllable AlCl3 is an efficient Electrolyte additive for dendrite-free Li deposition. The additive could react with trace water in the Electrolyte to form a stable Al2O3-rich Solid Electrolyte Interphase (SEI) layer on the surface of Li and Al-based positively charged colloidal particles (PCCPs) in the Electrolyte. PCCPs could form a positively charged electrostatic shield around the protruding lithium during the deposition process and induce the subsequent deposition of Li to the adjacent regions of the protruding Li, enabling a uniform and dendrite-free Li morphology. The assembled Li|Se and Li|Li4Ti5O12 batteries benefit from the synergism of SEI layer and PCCPs, thereby demonstrating the impressive capability for dendrite suppression of Li anode and improved electrochemical performance.
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an artificial Solid Electrolyte Interphase layer for stable lithium metal anodes
Advanced Materials, 2016Co-Authors: Ya Xia Yin, Chunpeng Yang, Yu-guo GuoAbstract:A Li3PO4 Solid Electrolyte Interphase (SEI) layer is demonstrated to be stable in the organic Electrolyte, even during the Li deposition/dissolution process. Thus, the Li-conducting Li3PO4 SEI layer with a high Young's modulus can effectively reduce side reactions between Li metal and the Electrolyte and can restrain Li dendrite growth in lithium-metal batteries during cycling.
Qiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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a sustainable Solid Electrolyte Interphase for high energy density lithium metal batteries under practical conditions
Angewandte Chemie, 2020Co-Authors: Xueqiang Zhang, Chong Yan, Jia-qi Huang, Rui Zhang, Peng Shi, Qiang ZhangAbstract:High-energy-density Li metal batteries suffer from a short lifespan under practical conditions, such as limited lithium, high loading cathode, and lean Electrolytes, owing to the absence of appropriate Solid Electrolyte Interphase (SEI). Herein, a sustainable SEI was designed rationally by combining fluorinated co-solvents with sustained-release additives for practical challenges. The intrinsic uniformity of SEI and the constant supplements of building blocks of SEI jointly afford to sustainable SEI. Specific spatial distributions and abundant heterogeneous grain boundaries of LiF, LiNx Oy , and Li2 O effectively regulate uniformity of Li deposition. In a Li metal battery with an ultrathin Li anode (33 μm), a high-loading LiNi0.5 Co0.2 Mn0.3 O2 cathode (4.4 mAh cm-2 ), and lean Electrolytes (6.1 g Ah-1 ), 83 % of initial capacity retains after 150 cycles. A pouch cell (3.5 Ah) demonstrated a specific energy of 340 Wh kg-1 for 60 cycles with lean Electrolytes (2.3 g Ah-1 ).
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fluorinated Solid Electrolyte Interphase in high voltage lithium metal batteries
Joule, 2019Co-Authors: Xueqiang Zhang, Peng Shi, Qiang ZhangAbstract:Summary Secondary batteries have shaped our modern life significantly, and high-energy-density rechargeable batteries are strongly required nowadays. However, practical Li-metal batteries have been hindered by short lifespan and safety concerns induced by Li dendrites during repeated cycles. The formation and growth of Li dendrites are mainly caused by unstable Solid-Electrolyte Interphase (SEI) on Li-metal anode. Therefore, stable SEI on Li-metal anode is highly anticipated to promote practical applications of Li-metal batteries. The fluorinated SEI emerges as a promising SEI to regulate the behaviors of Li deposition and then enhance the stability and safety of Li-metal batteries. In this perspective, we concisely review the current fundamental understanding and key progresses of fluorinated SEI in high-voltage Li-metal batteries. Finally, we suggest the challenges and possible research directions for further development of fluorinated SEI in practical Li-metal batteries.
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regulating the inner helmholtz plane for stable Solid Electrolyte Interphase on lithium metal anodes
Journal of the American Chemical Society, 2019Co-Authors: Chong Yan, Xin-bing Cheng, Jia-qi Huang, Xiang Chen, Xueqiang Zhang, Qiang ZhangAbstract:The stability of a battery is strongly dependent on the feature of Solid Electrolyte Interphase (SEI). The electrical double layer forms prior to the formation of SEI at the interface between the L...
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Implantable Solid Electrolyte Interphase in Lithium-Metal Batteries
Chem, 2017Co-Authors: Xin-bing Cheng, Shu Ting Yang, Chong Yan, Jia-qi Huang, Hong-jie Peng, Chao Guan, Rui Zhang, Xiang Chen, Qiang ZhangAbstract:Lithium (Li) metal is regarded as the “Holy Grail” electrode because of its low electrochemical potential and high theoretical capacity. Unfortunately, uncontrolled dendritic Li growth induces low coulombic efficiency and poor safety during deposition. Here, we propose an ex situ electrochemical strategy for constructing an ultra-stable implantable Solid Electrolyte Interphase (SEI) on a Li-metal anode. In our study, the SEI rendered dendrite-free Li deposits in a working battery. A Li-metal anode with a stable SEI can be transplanted into ether and ester Electrolyte to cycle sulfur (S) and a LiNi0.5Co0.2Mn0.3O2(NCM) cathode, respectively. The Li-S cell exhibited superb long-term cycling performance at 1.0 C with an initial capacity of 890 mAh g−1and capacity retention of 76% after 600 cycles. When matching the NCM cathode, the Li-metal anode with an implantable SEI avoided activation and increased capacity by 50% from 100 to 150 mAh g−1. A Li-metal anode with implantable SEI protection delivers new insights into the rational design of Li-metal batteries with many alternative cathodes and Electrolyte systems.