In Situ Construction of an Ultra-Stable Conductive Composite Interface for High-Voltage All-Solid-State Lithium Metal Batteries

Shi，Kai1; Wan，Zipei1; Yang，Lu2; Zhang，Yiwen2; Huang，Yanfei1; Su，Shiming1; Xia，Heyi1; Jiang，Keling1; Shen，Lu1; Hu，Yi1; Zhang，Shiqi1; Yu，Jing1; Ren，Fuzeng2; He，Yan Bing1; Kang，Feiyu1

2020

10.1002/ANGE.202000547

ADVANCED MATERIALS   Impact Factor & Quartile

0935-9648

1521-4095

The garnet electrolyte presents poor wettability with Li metal, resulting in an extremely large interfacial impedance and drastic growth of Li dendrites. Herein, a novel ultra-stable conductive composite interface (CCI) consisting of LiSn alloy and LiN is constructed in situ between LiLaZrTaO (LLZTO) pellet and Li metal by a conversion reaction of SnNx with Li metal at 300°C. The LiSn alloy as a continuous and robust bridge between LLZTO and Li metal can effectively reduce the LLZTO/Li interfacial resistance from 4468.0 Ω to 164.8 Ω. Meanwhile, the LiN as a fast Li-ion channel can efficiently transfer Li ions and give their uniform distribution at the LLZTO/Li interface. Therefore, the Li/LLZTO@CCI/ Li symmetric battery stably cycles for 1200 h without short circuit, and the all-solid-state high-voltage Li/LLZTO@CCI/ LiNiCoMnO battery achieves a specific capacity of 161.4 mAhg at 0.25 C with a capacity retention rate of 92.6% and coulombic efficiency of 100.0% after 200 cycles at 25°C.

Li3N LiySn alloy lithium metal batteries SnNx solid-state electrolytes

EI

English

NI Journal Papers

Corresponding

20223112453704

Binary alloys ; Interface states ; Lithium ; Lithium alloys ; Solid electrolytes ; Solid-State Batteries ; Tin alloys

Lithium and Alloys:542.4 ; Tin and Alloys:546.2 ; Alkali Metals:549.1 ; Secondary Batteries:702.1.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Classical Physics; Quantum Theory; Relativity:931 ; High Energy Physics; Nuclear Physics; Plasma Physics:932

MATERIALS SCIENCE

2-s2.0-85134878124

Scopus

1.Shenzhen Geim Graphene Center,Tsinghua Shenzhen International Graduate School,Tsinghua University,Shenzhen,518055,China
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China

Shi，Kai,Wan，Zipei,Yang，Lu,et al. In Situ Construction of an Ultra-Stable Conductive Composite Interface for High-Voltage All-Solid-State Lithium Metal Batteries[J]. ADVANCED MATERIALS,2020,59(29):11882-11886.

Shi，Kai.,Wan，Zipei.,Yang，Lu.,Zhang，Yiwen.,Huang，Yanfei.,...&Kang，Feiyu.(2020).In Situ Construction of an Ultra-Stable Conductive Composite Interface for High-Voltage All-Solid-State Lithium Metal Batteries.ADVANCED MATERIALS,59(29),11882-11886.

Shi，Kai,et al."In Situ Construction of an Ultra-Stable Conductive Composite Interface for High-Voltage All-Solid-State Lithium Metal Batteries".ADVANCED MATERIALS 59.29(2020):11882-11886.