材料科学
阳极
复合数
阴极
电化学
电解质
陶瓷
纳米片
氮化硼
纳米技术
复合材料
电极
物理化学
化学
作者
Jiayun Wen,Ying Huang,Jian Duan,Yongmin Wu,Wei Luo,Lihui Zhou,Chenchen Hu,Liqiang Huang,Xueying Zheng,Wenjuan Yang,Wen Zhang,Yunhui Huang
出处
期刊:ACS Nano
[American Chemical Society]
日期:2019-12-02
卷期号:13 (12): 14549-14556
被引量:125
标识
DOI:10.1021/acsnano.9b08803
摘要
Solid-state lithium metal batteries (SSLMBs) are promising energy storage devices by employing lithium metal anodes and solid-state electrolytes (SSEs) to offer high energy density and high safety. However, their efficiency is limited by Li metal/SSE interface barriers, including insufficient contact area and chemical/electrochemical incompatibility. Herein, a strategy to effectively improve the adhesiveness of Li metal to garnet-type SSE is proposed by adding only a few two-dimensional boron nitride nanosheets (BNNS) (5 wt %) into Li metal by triggering the transition from point contact to complete adhesion between Li metal and ceramic SSE. The interface between the Li-BNNS composite anode and the garnet exhibits a low interfacial resistance of 9 Ω cm2, which is significantly lower than that of bare Li/garnet interface (560 Ω cm2). Furthermore, the enhanced contact and the additional BNNS in the interface act synergistically to offer a high critical current density of 1.5 mA/cm2 and a stable electrochemical plating/striping over 380 h. Moreover, the full cell paired with the Li-BNNS composite anode and the LiFePO4 cathode shows stable cycling performance at room temperature. Our results introduce an appealing composite strategy with two-dimensional materials to overcome the interface challenges, which provide more opportunities for the development of SSLMBs.
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