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Air-stable and freestanding lithium alloy/graphene foil as an alternative to lithium metal anodes
Zhao, Jie; Zhou, Guangmin; Yan, Kai; Xie, Jin; Li, Yuzhang; Liao, Lei; Jin, Yang; Liu, Kai; Hsu, Po-Chun; Wang, Jiangyan; Cheng, Hui-Ming; Cui, Yi; Cui, Y (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.; Cui, Y (reprint author), SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
2017-10-01
发表期刊NATURE PUBLISHING GROUP
ISSN1748-3387
卷号12期号:10页码:993-999
摘要Developing high-capacity anodes is a must to improve the energy density of lithium batteries for electric vehicle applications. Alloy anodes are one promising option, but without pre-stored lithium, the overall energy density is limited by the low-capacity lithium metal oxide cathodes. Recently, lithium metal has been revived as a high-capacity anode, but faces several challenges owing to its high reactivity and uncontrolled dendrite growth. Here, we show a series of Li-containing foils inheriting the desirable properties of alloy anodes and pure metal anodes. They consist of densely packed LixM (M= Si, Sn, or Al) nanoparticles encapsulated by large graphene sheets. With the protection of graphene sheets, the large and freestanding LixM/graphene foils are stable in different air conditions. With fully expanded LixSi confined in the highly conductive and chemically stable graphene matrix, this LixSi/graphene foil maintains a stable structure and cyclability in half cells (400 cycles with 98% capacity retention). This foil is also paired with high-capacity Li-free V2O5 and sulfur cathodes to achieve stable full-cell cycling.; Developing high-capacity anodes is a must to improve the energy density of lithium batteries for electric vehicle applications. Alloy anodes are one promising option, but without pre-stored lithium, the overall energy density is limited by the low-capacity lithium metal oxide cathodes. Recently, lithium metal has been revived as a high-capacity anode, but faces several challenges owing to its high reactivity and uncontrolled dendrite growth. Here, we show a series of Li-containing foils inheriting the desirable properties of alloy anodes and pure metal anodes. They consist of densely packed LixM (M= Si, Sn, or Al) nanoparticles encapsulated by large graphene sheets. With the protection of graphene sheets, the large and freestanding LixM/graphene foils are stable in different air conditions. With fully expanded LixSi confined in the highly conductive and chemically stable graphene matrix, this LixSi/graphene foil maintains a stable structure and cyclability in half cells (400 cycles with 98% capacity retention). This foil is also paired with high-capacity Li-free V2O5 and sulfur cathodes to achieve stable full-cell cycling.
部门归属[zhao, jie ; zhou, guangmin ; yan, kai ; xie, jin ; li, yuzhang ; liao, lei ; jin, yang ; liu, kai ; hsu, po-chun ; wang, jiangyan ; cui, yi] stanford univ, dept mat sci & engn, stanford, ca 94305 usa ; [cheng, hui-ming] chinese acad sci, shenyang natl lab mat sci, inst met res, 72 wenhua rd, shenyang 110016, liaoning, peoples r china ; [cheng, hui-ming] tsinghua univ, tsinghua berkeley shenzhen inst, 1001 xueyuan rd, shenzhen 518055, peoples r china ; [cui, yi] slac natl accelerator lab, stanford inst mat & energy sci, 2575 sand hill rd, menlo pk, ca 94025 usa
学科领域Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
资助者Office of Vehicle Technologies, Battery Materials Research Program of the US Department of Energy; National Science Foundation Graduate Fellowship Program
收录类别SCI
语种英语
文献类型期刊论文
条目标识符http://ir.imr.ac.cn/handle/321006/79072
专题中国科学院金属研究所
通讯作者Cui, Y (reprint author), Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA.; Cui, Y (reprint author), SLAC Natl Accelerator Lab, Stanford Inst Mat & Energy Sci, 2575 Sand Hill Rd, Menlo Pk, CA 94025 USA.
推荐引用方式
GB/T 7714
Zhao, Jie,Zhou, Guangmin,Yan, Kai,et al. Air-stable and freestanding lithium alloy/graphene foil as an alternative to lithium metal anodes[J]. NATURE PUBLISHING GROUP,2017,12(10):993-999.
APA Zhao, Jie.,Zhou, Guangmin.,Yan, Kai.,Xie, Jin.,Li, Yuzhang.,...&Cui, Y .(2017).Air-stable and freestanding lithium alloy/graphene foil as an alternative to lithium metal anodes.NATURE PUBLISHING GROUP,12(10),993-999.
MLA Zhao, Jie,et al."Air-stable and freestanding lithium alloy/graphene foil as an alternative to lithium metal anodes".NATURE PUBLISHING GROUP 12.10(2017):993-999.
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