The Experts below are selected from a list of 9660 Experts worldwide ranked by ideXlab platform
Guangyuan Wesley Zheng - One of the best experts on this subject based on the ideXlab platform.
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mechanical rolling formation of interpenetrated lithium metal lithium Tin Alloy foil for ultrahigh rate battery anode
Nature Communications, 2020Co-Authors: Sujin Kang, Li Wang, Guangyuan Wesley ZhengAbstract:To achieve good rate capability of lithium metal anodes for high-energy-density batteries, one fundamental challenge is the slow lithium diffusion at the interface. Here we report an interpenetrated, three-dimensional lithium metal/lithium Tin Alloy nanocomposite foil realized by a simple calendering and folding process of lithium and Tin foils, and spontaneous Alloying reactions. The strong affinity between the metallic lithium and lithium Tin Alloy as mixed electronic and ionic conducTing networks, and their abundant interfaces enable ultrafast charger diffusion across the entire electrode. We demonstrate that a lithium/lithium Tin Alloy foil electrode sustains stable lithium stripping/plaTing under 30 mA cm−2 and 5 mAh cm−2 with a very low overpotential of 20 mV for 200 cycles in a commercial carbonate electrolyte. Cycled under 6 C (6.6 mA cm−2), a 1.0 mAh cm−2 LiNi0.6Co0.2Mn0.2O2 electrode maintains a substantial 74% of its capacity by pairing with such anode. Sluggish lithium diffusion on the surface of Li metal anodes poses a fundamental challenge. Here the authors report a Li/Li22Sn5 Alloy design to address this issue. The composite anode sustains stable Li stripping/plaTing cycling with a low overpotential of 20 mV under 30 mA cm−2 in a commercial carbonate electrolyte.
Li Wang - One of the best experts on this subject based on the ideXlab platform.
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mechanical rolling formation of interpenetrated lithium metal lithium Tin Alloy foil for ultrahigh rate battery anode
Nature Communications, 2020Co-Authors: Sujin Kang, Li Wang, Guangyuan Wesley ZhengAbstract:To achieve good rate capability of lithium metal anodes for high-energy-density batteries, one fundamental challenge is the slow lithium diffusion at the interface. Here we report an interpenetrated, three-dimensional lithium metal/lithium Tin Alloy nanocomposite foil realized by a simple calendering and folding process of lithium and Tin foils, and spontaneous Alloying reactions. The strong affinity between the metallic lithium and lithium Tin Alloy as mixed electronic and ionic conducTing networks, and their abundant interfaces enable ultrafast charger diffusion across the entire electrode. We demonstrate that a lithium/lithium Tin Alloy foil electrode sustains stable lithium stripping/plaTing under 30 mA cm−2 and 5 mAh cm−2 with a very low overpotential of 20 mV for 200 cycles in a commercial carbonate electrolyte. Cycled under 6 C (6.6 mA cm−2), a 1.0 mAh cm−2 LiNi0.6Co0.2Mn0.2O2 electrode maintains a substantial 74% of its capacity by pairing with such anode. Sluggish lithium diffusion on the surface of Li metal anodes poses a fundamental challenge. Here the authors report a Li/Li22Sn5 Alloy design to address this issue. The composite anode sustains stable Li stripping/plaTing cycling with a low overpotential of 20 mV under 30 mA cm−2 in a commercial carbonate electrolyte.
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Mechanical rolling formation of interpenetrated lithium metal/lithium Tin Alloy foil for ultrahigh-rate battery anode
'Springer Science and Business Media LLC', 2020Co-Authors: Wan Mintao, Li Wang, Kang Sujin, Lee Hyun-wook, Zheng, Guangyuan Wesley, Yi Cui, Sun YongmingAbstract:To achieve good rate capability of lithium metal anodes for high-energy-density batteries, one fundamental challenge is the slow lithium diffusion at the interface. Here we report an interpenetrated, three-dimensional lithium metal/lithium Tin Alloy nanocomposite foil realized by a simple calendering and folding process of lithium and Tin foils, and spontaneous Alloying reactions. The strong affinity between the metallic lithium and lithium Tin Alloy as mixed electronic and ionic conducTing networks, and their abundant interfaces enable ultrafast charger diffusion across the entire electrode. We demonstrate that a lithium/lithium Tin Alloy foil electrode sustains stable lithium stripping/plaTing under 30mAcm(-2) and 5mAhcm(-2) with a very low overpotential of 20mV for 200 cycles in a commercial carbonate electrolyte. Cycled under 6C (6.6mAcm(-2)), a 1.0mAhcm(-2) LiNi0.6Co0.2Mn0.2O2 electrode maintains a substantial 74% of its capacity by pairing with such anode
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Nanometer copper–Tin Alloy anode material for lithium-ion batteries
Electrochimica Acta, 2007Co-Authors: Jianguo Ren, Li Wang, Changyin Jiang, Chunrong WanAbstract:Abstract Nanometer copper–Tin Alloy anode materials with amorphous structure were prepared by a reverse microemulsion technique for lithium-ion batteries. It was found that the electrochemical performance of Alloy was influenced by its particle size, which was controlled by appropriate surfactant content. The nanometer copper–Tin Alloy with particle size of 50–60 nm presented the best performance, showing a reversible specific capacity of 300 mA h/g over the full voltage range 0.0–1.2 V and capacity retention of 93.3% at 50 cycles. A great irreversible capacity was caused by the formation of a SEI layer on the surface of nanometer Alloy. The contact resistance between nanometer particles resulted in the poor electric conductivity and the match of particle size and conductive agent content had a great impact on the electrochemical performance of the nanometer copper–Tin Alloy anode.
Chunrong Wan - One of the best experts on this subject based on the ideXlab platform.
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Nanometer copper–Tin Alloy anode material for lithium-ion batteries
Electrochimica Acta, 2007Co-Authors: Jianguo Ren, Li Wang, Changyin Jiang, Chunrong WanAbstract:Abstract Nanometer copper–Tin Alloy anode materials with amorphous structure were prepared by a reverse microemulsion technique for lithium-ion batteries. It was found that the electrochemical performance of Alloy was influenced by its particle size, which was controlled by appropriate surfactant content. The nanometer copper–Tin Alloy with particle size of 50–60 nm presented the best performance, showing a reversible specific capacity of 300 mA h/g over the full voltage range 0.0–1.2 V and capacity retention of 93.3% at 50 cycles. A great irreversible capacity was caused by the formation of a SEI layer on the surface of nanometer Alloy. The contact resistance between nanometer particles resulted in the poor electric conductivity and the match of particle size and conductive agent content had a great impact on the electrochemical performance of the nanometer copper–Tin Alloy anode.
Fengju Zhang - One of the best experts on this subject based on the ideXlab platform.
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Carbon-coated copper–Tin Alloy anode material for lithium ion batteries
Journal of Alloys and Compounds, 2008Co-Authors: Sheng Liu, Yuxi Chen, Fengju ZhangAbstract:Abstract Carbon-coated copper–Tin Alloy powders were prepared by heaTing of mixtures of thermoplastic poly(vinyl alcohol) and nano-sized copper–Tin Alloy particles in argon atmosphere. The products were characterized by X-ray diffraction (XRD), thermogravimetric analysis (TGA), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The electrochemical properties of the carbon-coated copper–Tin Alloy powders as anode materials for lithium batteries were studied by cyclic voltammetry (CV) and galvanostatic method. The anode showed high charge capacity up to 460 mAh g −1 and stable cyclic performance even after 40 cycles. This could be ascribed to the existence of inactive matrix Cu which buffered the large volume change in the course of Li–Sn Alloying–deAlloying process, and the presence of carbon layer of Alloy particles which enhanced dimensional stability during Li–Sn Alloying–deAlloying electrochemical process.
Sujin Kang - One of the best experts on this subject based on the ideXlab platform.
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mechanical rolling formation of interpenetrated lithium metal lithium Tin Alloy foil for ultrahigh rate battery anode
Nature Communications, 2020Co-Authors: Sujin Kang, Li Wang, Guangyuan Wesley ZhengAbstract:To achieve good rate capability of lithium metal anodes for high-energy-density batteries, one fundamental challenge is the slow lithium diffusion at the interface. Here we report an interpenetrated, three-dimensional lithium metal/lithium Tin Alloy nanocomposite foil realized by a simple calendering and folding process of lithium and Tin foils, and spontaneous Alloying reactions. The strong affinity between the metallic lithium and lithium Tin Alloy as mixed electronic and ionic conducTing networks, and their abundant interfaces enable ultrafast charger diffusion across the entire electrode. We demonstrate that a lithium/lithium Tin Alloy foil electrode sustains stable lithium stripping/plaTing under 30 mA cm−2 and 5 mAh cm−2 with a very low overpotential of 20 mV for 200 cycles in a commercial carbonate electrolyte. Cycled under 6 C (6.6 mA cm−2), a 1.0 mAh cm−2 LiNi0.6Co0.2Mn0.2O2 electrode maintains a substantial 74% of its capacity by pairing with such anode. Sluggish lithium diffusion on the surface of Li metal anodes poses a fundamental challenge. Here the authors report a Li/Li22Sn5 Alloy design to address this issue. The composite anode sustains stable Li stripping/plaTing cycling with a low overpotential of 20 mV under 30 mA cm−2 in a commercial carbonate electrolyte.
