Improving the Interfacial Stability between Lithium and Solid-State Electrolyte via Dipole-Structured Lithium Layer Deposited on Graphene Oxide

doi:10.1002/advs.202000237

CORC > 宁波材料技术与工程研究所 > 中国科学院宁波材料技术与工程研究所 > 2020专题

	Improving the Interfacial Stability between Lithium and Solid-State Electrolyte via Dipole-Structured Lithium Layer Deposited on Graphene Oxide
	Wang, Muqin ; Peng, Zhe ; Luo, Wenwei ; Zhang, Qiang ; Li, Zhendong ; Zhu, Yun ; Lin, Huan ; Cai, Liangting ; Yao, Xiayin ; Ouyang, Chuying
刊名	ADVANCED SCIENCE
	2020
卷号	7 期号:13
关键词	METAL ANODES LI10GEP2S12 BATTERIES BEHAVIOR
DOI	10.1002/advs.202000237
英文摘要	Utilization of lithium (Li) metal anode in solid-state batteries (SSBs) with sulfide solid-state electrolyte (SSE) is hindered by the instable Li/SSE interface. A general solution to solve this problem is to place an expensive indium (In) foil between the SSE and Li, while it decreases the output voltage and thus the energy density of the battery. In this work, an alternative strategy is demonstrated to boost the cycling performances of SSB by wrapping a graphene oxide (GO) layer on the anode. According to density functional theory results, initial deposition of a thin Li layer on the defective GO sheets leads to the formation of a dipole structure, due to the electron-withdrawing ability of GO acting on Li. By incorporating GO sheets in a nanocomposite of copper-cuprous oxide-GO (Cu-Cu2O-GO, CCG), a composite Li anode enables a high coulombic efficiency above 99.5% over 120 cycles for an SSB using Li10GeP2S12 SSE and LiCoO2 cathode, and the sulfide SSE is not chemically decomposed after cycling. The highest occupied molecule orbital/lowest unoccupied molecular orbital energy gap of this Li/GO dipole structure likely stretches over those of Li and sulfide SSE, enabling stabilized Li/SSE interface that can replace the expensive In layer as Li protective structure in SSBs.
学科主题	Chemistry ; Science & Technology - Other Topics ; Materials Science
内容类型	期刊论文
源URL	[http://ir.nimte.ac.cn/handle/174433/20791]
专题	2020专题
作者单位	1.Peng, Z 2.Wang, DY (corresponding author), Chinese Acad Sci, Ningbo Inst Mat Technol & Engn, Ningbo 315201, Peoples R China. 3.Ouyang, CY (corresponding author), Jiangxi Normal Univ, Dept Phys, Lab Computat Mat Phys, Nanchang 330022, Jiangxi, Peoples R China.
推荐引用方式 GB/T 7714	Wang, Muqin,Peng, Zhe,Luo, Wenwei,et al. Improving the Interfacial Stability between Lithium and Solid-State Electrolyte via Dipole-Structured Lithium Layer Deposited on Graphene Oxide[J]. ADVANCED SCIENCE,2020,7(13).
APA	Wang, Muqin.,Peng, Zhe.,Luo, Wenwei.,Zhang, Qiang.,Li, Zhendong.,...&Wang, Deyu.(2020).Improving the Interfacial Stability between Lithium and Solid-State Electrolyte via Dipole-Structured Lithium Layer Deposited on Graphene Oxide.ADVANCED SCIENCE,7(13).
MLA	Wang, Muqin,et al."Improving the Interfacial Stability between Lithium and Solid-State Electrolyte via Dipole-Structured Lithium Layer Deposited on Graphene Oxide".ADVANCED SCIENCE 7.13(2020).