The Experts below are selected from a list of 360 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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an intermediate temperature garnet type Solid Electrolyte based molten lithium battery for grid energy storage
Nature Energy, 2018Co-Authors: Jialiang Lang, Denys Zhuo, Zeya Huang, Yang Jin, Hui Wu, Changan Wang, Kai Liu, Yi CuiAbstract:Batteries are an attractive grid energy storage technology, but a reliable battery system with the functionalities required for a grid such as high power capability, high safety and low cost remains elusive. Here, we report a Solid Electrolyte-based molten lithium battery constructed with a molten lithium anode, a molten Sn–Pb or Bi–Pb alloy cathode and a garnet-type Li6.4La3Zr1.4Ta0.6O12 (LLZTO) Solid Electrolyte tube. We show that the assembled Li||LLZTO||Sn–Pb and Li||LLZTO||Bi–Pb cells can stably cycle at an intermediate temperature of 240 °C for about one month at current densities of 50 mA cm−2 and 100 mA cm−2 respectively, with almost no capacity decay and an average Coulombic efficiency of 99.98%. Furthermore, the cells demonstrate high power capability with current densities up to 300 mA cm−2 (90 mW cm−2) for Li||LLZTO||Sn–Pb and 500 mA cm−2 (175 mW cm−2) for Li||LLZTO||Bi–Pb. Our design offers prospects for grid energy storage with intermediate temperature operations, high safety margin and low capital and maintenance costs.
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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, Yi Cui, Allen Pei, David T Boyle, Jin Xie, 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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stable cycling of double walled silicon nanotube battery anodes through Solid Electrolyte interphase control
Nature Nanotechnology, 2012Co-Authors: Gerentt Chan, Jang Wook Choi, Ill Ryu, Yan Yao, Matthew T Mcdowell, Seok Woo Lee, Ariel Jackson, Yuan Yang, Yi CuiAbstract:Although the performance of lithium ion-batteries continues to improve, their energy density and cycle life remain insufficient for applications in consumer electronics, transport and large-scale renewable energy storage. Silicon has a large charge storage capacity and this makes it an attractive anode material, but pulverization during cycling and an unstable Solid-Electrolyte interphase has limited the cycle life of silicon anodes to hundreds of cycles. Here, we show that anodes consisting of an active silicon nanotube surrounded by an ion-permeable silicon oxide shell can cycle over 6,000 times in half cells while retaining more than 85% of their initial capacity. The outer surface of the silicon nanotube is prevented from expansion by the oxide shell, and the expanding inner surface is not exposed to the Electrolyte, resulting in a stable Solid-Electrolyte interphase. Batteries containing these double-walled silicon nanotube anodes exhibit charge capacities approximately eight times larger than conventional carbon anodes and charging rates of up to 20C (a rate of 1C corresponds to complete charge or discharge in one hour).
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.
Masakazu Aono - One of the best experts on this subject based on the ideXlab platform.
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atomically controlled electrochemical nucleation at superionic Solid Electrolyte surfaces
Nature Materials, 2012Co-Authors: Ilia Valov, Tsuyoshi Hasegawa, Masakazu Aono, Ina Sapezanskaia, Alpana Nayak, Tohru Tsuruoka, Thomas Bredow, Georgi Staikov, Rainer WaserAbstract:Electrochemical equilibrium and the transfer of mass and charge through interfaces at the atomic scale are of fundamental importance for the microscopic understanding of elementary physicochemical processes. Approaching atomic dimensions, phase instabilities and instrumentation limits restrict the resolution. Here we show an ultimate lateral, mass and charge resolution during electrochemical Ag phase formation at the surface of RbAg(4)I(5) superionic conductor thin films. We found that a small amount of electron donors in the Solid Electrolyte enables scanning tunnelling microscope measurements and atomically resolved imaging. We demonstrate that Ag critical nucleus formation is rate limiting. The Gibbs energy of this process takes discrete values and the number of atoms of the critical nucleus remains constant over a large range of applied potentials. Our approach is crucial to elucidate the mechanism of atomic switches and highlights the possibility of extending this method to a variety of other electrochemical systems.
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Diffusivity of Cu Ions in Solid Electrolyte and Its Effect on the Performance of Nanometer-Scale Switch
IEEE Transactions on Electron Devices, 2008Co-Authors: Naoki Banno, Toshitsugu Sakamoto, Tsuyoshi Hasegawa, Kazuya Terabe, Noriyuki Iguchi, Hiroshi Sunamura, Masakazu AonoAbstract:A novel Solid-Electrolyte nonvolatile switch that we previously developed for programmable large-scale-integration circuits turns on or off when a conducting Cu bridge is formed or dissolved in the Solid Electrolyte. Cu+ ion migration and an electrochemical reaction are involved in the switching process. For logic applications, we need to adjust its turn-on voltage (V ON), which was too small to maintain the conductance state during logic operations. In this paper, we clarified that V ON is mainly affected by the rate of Cu+ ion migration in the Solid Electrolyte. Considering the relationship between the migration rate and V ON, we replaced the former Electrolyte, Cu2-alphaS, with Ta2O5, which enabled us to appropriately adjust V ON with a smaller Cu+ ion diffusion coefficient.
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effect of ion diffusion on switching voltage of Solid Electrolyte nanometer switch
The Japan Society of Applied Physics, 2005Co-Authors: Naoki Banno, Toshitsugu Sakamoto, Tsuyoshi Hasegawa, Kazuya Terabe, Masakazu AonoAbstract:A Solid Electrolyte switch turns on or off when a metallic bridge is formed or dissolved respectively in the Solid Electrolyte (here we use Cu2-αS). For logic applications, the switching voltage (<0.3 V) should be larger than the operating voltage of the logic circuit (about 1 V). We reveal that the switching voltage is mainly affected by Cu+ ionic transport in Cu2-αS and that a Solid Electrolyte with an ion diffusion coefficient smaller than that of Cu2-αS by several tens of orders of magnitude makes it possible to increase the switching voltage to 1 V.
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a nonvolatile programmable Solid Electrolyte nanometer switch
International Solid-State Circuits Conference, 2004Co-Authors: Shunichi Kaeriyama, Toshitsugu Sakamoto, Tsuyoshi Hasegawa, Kazuya Terabe, Hiroshi Sunamura, Masayuki Mizuno, Hisao Kawaura, Tomonobu Nakayama, Masakazu AonoAbstract:A reconfigurable LSI employing a nonvolatile nanometer-scale switch, NanoBridge, is proposed, and its basic operations are demonstrated. The switch, composed of Solid Electrolyte copper sulfide, has a <30-nm contact diameter and <100-/spl Omega/ on-resistance. Because of its small size, it can be used to create extremely dense field-programmable logic arrays. A 4 /spl times/ 4 crossbar switch and a 2-input look-up-table circuit are fabricated with 0.18-/spl mu/m CMOS technology, and operational tests with them have confirmed the switch's potential for use in programmable logic arrays. A 1-kb nonvolatile memory is also presented, and its potential for use as a low-voltage memory device is demonstrated.
Qiang Zhang - One of the best experts on this subject based on the ideXlab platform.
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lithium matrix composite anode protected by a Solid Electrolyte layer for stable lithium metal batteries
Journal of Energy Chemistry, 2019Co-Authors: Xin Shen, Chong Yan, Xin-bing Cheng, Jia-qi Huang, Peng Shi, Xueqiang Zhang, Qiang ZhangAbstract:Abstract Lithium (Li) metal with an ultrahigh specific theoretical capacity and the lowest reduction potential is strongly considered as a promising anode for high-energy-density batteries. However, uncontrolled lithium dendrites and infinite volume change during repeated plating/stripping cycles hinder its practical applications immensely. Herein, a house-like Li anode (housed Li) was designed to circumvent the above issues. The house matrix was composed of carbon fiber matrix and affords a stable structure to relieve the volume change. An artificial Solid Electrolyte layer was formed on composite Li metal, just like the roof of a house, which facilitates uniform Li ions diffusion and serves as a physical barrier against Electrolyte corrosion. With the combination of Solid Electrolyte layer and matrix in the composite Li metal anode, both dendrite growth and volume expansion are remarkably inhibited. The housed Li | LiFePO4 batteries exhibited over 95% capacity retention after 500 cycles at 1.0 C in coin cell and 85% capacity retention after 80 cycles at 0.5 C in pouch cell. The rationally combination of Solid Electrolyte layer protection and housed framework in one Li metal anode sheds fresh insights on the design principle of a safe and long-lifespan Li metal anode for 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.
Masahiro Tatsumisago - One of the best experts on this subject based on the ideXlab platform.
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preparation of high lithium ion conducting li6ps5cl Solid Electrolyte from ethanol solution for all Solid state lithium batteries
Journal of Power Sources, 2015Co-Authors: So Yubuchi, Shingo Teragawa, Kiyoharu Tadanaga, Akitoshi Hayashi, Masahiro TatsumisagoAbstract:Abstract A Li 6 PS 5 Cl Solid Electrolyte was successfully prepared by dissolution-reprecipitation process via ethanol solution. An ionic conductivity of the Li 6 PS 5 Cl Solid Electrolyte from the homogeneous ethanol solution was 1.4 × 10 −5 S cm −1 at room temperature. LiCoO 2 particles were coated with the Li 6 PS 5 Cl Electrolyte via ethanol solution to form favorable electrode-Electrolyte interface with a large contact areas. An all-Solid-state cell using the Electrolyte-coated LiCoO 2 operated as a rechargeable battery and showed the initial discharge capacity of 45 mAh g −1 at 25 °C.
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formation of li2s p2s5 Solid Electrolyte from n methylformamide solution
ChemInform, 2014Co-Authors: Shingo Teragawa, Keigo Aso, Kiyoharu Tadanaga, Akitoshi Hayashi, Masahiro TatsumisagoAbstract:The title Solid Electrolyte is prepared by drying N-methylformamide solutions of 80Li2S·20P2S5 powders (obtained by mechanical milling) at 150 °C for 3 h under vacuum.
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liquid phase synthesis of a li3ps4 Solid Electrolyte using n methylformamide for all Solid state lithium batteries
Journal of Materials Chemistry, 2014Co-Authors: Shingo Teragawa, Keigo Aso, Kiyoharu Tadanaga, Akitoshi Hayashi, Masahiro TatsumisagoAbstract:A Li3PS4 Solid Electrolyte was directly synthesized from Li2S and P2S5 by a liquid-phase reaction using N-methylformamide (NMF) and n-hexane as reaction media. After the reaction of Li2S and P2S5, a yellow NMF solution was obtained. The NMF solution was dried at 180 °C for 3 hours under vacuum to remove NMF and to obtain a powder. A crystalline phase of the obtained powder from the NMF solution was attributed to Li3PS4 crystals, and the ionic conductivity of the obtained powder was 2.3 × 10−6 S cm−1 at 25 °C. Electrode–Electrolyte composite materials for all-Solid-state lithium batteries were prepared by coating the Li3PS4 Solid Electrolyte onto LiCoO2 particles using the NMF solution. SEM and EDX analysis showed that LiCoO2 particles were uniformly coated with the Li3PS4 Solid Electrolyte. An all-Solid-state cell using the LiCoO2 particles coated with the Li3PS4 Solid Electrolyte as a positive electrode operated as a secondary battery.
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preparation of li 2 s p 2 s 5 Solid Electrolyte from n methylformamide solution and application for all Solid state lithium battery
Journal of Power Sources, 2014Co-Authors: Shingo Teragawa, Keigo Aso, Kiyoharu Tadanaga, Akitoshi Hayashi, Masahiro TatsumisagoAbstract:Electrode–Solid Electrolyte composite materials for all-Solid-state lithium batteries were prepared by coating of the Li2S–P2S5 Solid Electrolyte onto LiCoO2 particles using a N-methylformamide (NMF) solution of 80Li2S·20P2S5 (mol%) Solid Electrolyte. SEM and EDX analysis showed that the Li2S–P2S5 Solid Electrolyte was uniformly coated on LiCoO2 particles. The all-Solid-state cell using the LiCoO2 particles coated with the Solid Electrolyte showed higher charge–discharge capacity than the cells using uncoated LiCoO2 particles.
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formation of li2s p2s5 Solid Electrolyte from n methylformamide solution
Chemistry Letters, 2013Co-Authors: Shingo Teragawa, Keigo Aso, Kiyoharu Tadanaga, Akitoshi Hayashi, Masahiro TatsumisagoAbstract:Li2S–P2S5 Solid Electrolyte (SE) powders were successfully reprecipitated from a liquid phase. Powders of 80Li2S·20P2S5 (mol %) SE originally prepared by mechanical milling were dissolved in N-meth...