Fast Lithium Ionic Conductivity in Complex Hydride-Sulfide Electrolytes by Double Anions Substitution

Zhang, Tengfei1; Shao, Yifei1; Zhang, Xiang1; Huang, Yuqin2; Wang, Shuai3; Zhou, Wei4; Li, Peng1; Xia, Guanglin2; Yu, Xuebin2

2021-07-01

10.1002/smtd.202100609

Small Methods   影响因子和分区

2366-9608

Hydride-based solid-state electrolytes (SSEs) can maintain their stability against Li metal and exhibit high compatibility with a Li metal anode owing to their reducing property and flexible character. However, poor ionic conductivity at room temperature is a major challenge for hydride materials used as SSEs in a lithium ion battery. In this work, a room-temperature fast lithium-ion conductor is explored in response to double anion substitution, (100-x)(3LiBH(4)-LiI)-xP(2)S(5) (LLPx, 0 <= x <= 50). Among these samples, LLP20 respectively delivers an ionic conductivity up to 3.77 x 10(-4) S cm(-1) at 30 degrees C and 1.0 x 10(-2) S cm(-1) at 100 degrees C, with a stable electrochemical window of 0-5 V. A Li plating/stripping test has been conducted under a current density of 1.0 mA cm(-2), which exhibits an excellent stability even after 1000 h. Moreover, the all solid-state cell exhibits a remarkable electrochemical performance in a wide temperature range including high reversible capacity, good rate capability, and long cycling durability. These outstanding performances present a practical strategy for developing ambient-temperature, fast ionic conductors for all solid-state batteries in near future.

complex hydrides LiBH4 lithium ionic conductivity solid-state electrolytes sulfide electrolytes

SCI ; EI

英语

其他

National Natural Science Foundation of China[51625102,51802154] ; Open Fund of Jiangsu Key Laboratory of Electrochemical Energy Storage Technologies[EEST2019-2]

Chemistry ; Science & Technology - Other Topics ; Materials Science

Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary

WOS:000671455900001

WILEY-V C H VERLAG GMBH

20212810620228

Durability ; Hydrides ; Ionic conduction in solids ; Ionic conductivity ; Lithium compounds ; Lithium-ion batteries ; Negative ions ; Solid state devices ; Solid-State Batteries ; Sulfur compounds

Electricity: Basic Concepts and Phenomena:701.1 ; Semiconductor Devices and Integrated Circuits:714.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Inorganic Compounds:804.2

Web of Science

1.Nanjing Univ Aeronaut & Astronaut, Coll Mat Sci & Technol, Jiangsu Key Lab Electrochem Energy Storage Techno, Nanjing 210016, Peoples R China
2.Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China
3.Southern Univ Sci & Technol, Dept Mech & Energy Engn, Shenzhen 518055, Peoples R China
4.Tianjin Univ, Dept Phys, 92 Weijin Rd, Tianjin 300072, Peoples R China

Zhang, Tengfei,Shao, Yifei,Zhang, Xiang,et al. Fast Lithium Ionic Conductivity in Complex Hydride-Sulfide Electrolytes by Double Anions Substitution[J]. Small Methods,2021,5.

Zhang, Tengfei.,Shao, Yifei.,Zhang, Xiang.,Huang, Yuqin.,Wang, Shuai.,...&Yu, Xuebin.(2021).Fast Lithium Ionic Conductivity in Complex Hydride-Sulfide Electrolytes by Double Anions Substitution.Small Methods,5.

Zhang, Tengfei,et al."Fast Lithium Ionic Conductivity in Complex Hydride-Sulfide Electrolytes by Double Anions Substitution".Small Methods 5(2021).