Building an artificial solid electrolyte interphase with high-uniformity and fast ion diffusion for ultralong-life sodium metal anodes

Chen, Qianwen1; He, Heng1,2; Hou, Zhen1; Zhuang, Weiman1; Zhang, Tianxu1; Sun, Zongzhao1,2; Huang, Limin1,3

2020-08-28

10.1039/d0ta04715e

Journal of Materials Chemistry A   影响因子和分区

2050-7488

2050-7496

Na metal is regarded as a promising anode for Na batteries owing to its high specific capacity and natural abundance. However, rapid dendrite growth and low reversibility hinder its practical applications. Building an artificial solid electrolyte interphase (SEI) is an effective strategy to stabilize a Na metal anode, yet it still does not achieve high current density and cycling capacity. Here, two artificial SEI layers were constructed through analogous reactions between Na metal and pure SnCl4 liquid (SnCl4-Na electrode) or diglyme solvent with an SnCl2 additive (SnCl2-Na electrode) to investigate the key parameters for an excellent artificial SEI. Both simulations and experiments demonstrate that the high-uniformity and high Na+ diffusion properties of the SnCl4-derived protective layer are significant for stabilizing Na metal anodes under rigorous test conditions. Therefore, the SnCl4-Na electrode protected by a homogeneous and high Na+ diffusion Na-Sn alloy and NaCl achieves an ultralong cycle life of 4000 h and small voltage hysteresis (similar to 100 mV) with a cycling capacity of 3 mA h cm(-2) at 2 mA cm(-2), which is much better than that of the SnCl2-Na electrode. Moreover, even with a cycling capacity of 5 mA h cm(-2) at 5 mA cm(-2), the SnCl4-Na electrode can stably run for similar to 1500 h. Benefiting from the durable SEI layer, a stable capacity of similar to 350 mA h g(-1) is observed on a SnCl4-Na vertical bar FeS2 full cell for 380 cycles.

SCI ; EI

英语

第一 ; 通讯

Guangdong Innovative and Entrepreneurial Research Team Program[2016ZT06N532] ; Guangdong Provincial Key Laboratory of Energy Materials for Electric Power[2018B030322001] ; Guangdong Provincial Key Laboratory of Catalysis[2020B121201002] ; Shenzhen Clean Energy Research Institute[CERI-KY-2019-003]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000561168500056

ROYAL SOC CHEMISTRY

20204409441060

Diffusion ; Tin compounds ; Lead alloys ; Seebeck effect ; Solid electrolytes ; Sodium chloride ; Tin alloys ; Binary alloys ; Metals ; Pyrites ; Sodium alloys

Lead and Alloys:546.1 ; Tin and Alloys:546.2 ; Alkali Metals:549.1 ; Electricity: Basic Concepts and Phenomena:701.1 ; Electron Tubes:714.1 ; Chemical Agents and Basic Industrial Chemicals:803

Web of Science

1.Southern Univ Sci & Technol SUSTech, Dept Chem, Shenzhen 518055, Guangdong, Peoples R China
2.Harbin Inst Technol, Sch Chem & Chem Engn, Harbin 150001, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Energy Mat Elect Power, Shenzhen 518055, Guangdong, Peoples R China

Chen, Qianwen,He, Heng,Hou, Zhen,et al. Building an artificial solid electrolyte interphase with high-uniformity and fast ion diffusion for ultralong-life sodium metal anodes[J]. Journal of Materials Chemistry A,2020,8(32):16232-16237.

Chen, Qianwen.,He, Heng.,Hou, Zhen.,Zhuang, Weiman.,Zhang, Tianxu.,...&Huang, Limin.(2020).Building an artificial solid electrolyte interphase with high-uniformity and fast ion diffusion for ultralong-life sodium metal anodes.Journal of Materials Chemistry A,8(32),16232-16237.

Chen, Qianwen,et al."Building an artificial solid electrolyte interphase with high-uniformity and fast ion diffusion for ultralong-life sodium metal anodes".Journal of Materials Chemistry A 8.32(2020):16232-16237.