Promoting ion adsorption and desolvation kinetics enables high capacity and rate capability of stibium anode for advanced alkaline battery  

作　　者：Peng Zhang Jinhao Xie Fan Yang Xin Shi Yanxia Yu Xihong Lu 

机构地区：[1]College of Materials Science and Engineering,Guangdong Provincial Engineering Technology Research Center of Key Material for High Performance Copper Clad Laminate,Dongguan Cleaner Production Center,Dongguan University of Technology,Dongguan 523808,China [2]MOE of the Key Laboratory of Bioinorganic and Synthetic Chemistry,The Key Lab of Low-carbon Chem and Energy Conservation of Guangdong Province,School of Chemistry,Sun Yat-Sen University,Guangzhou 510275,China [3]School of Applied Physics and Materials,Wuyi University,Jiangmen 529020,China

出　　处：《Journal of Materials Science & Technology》2022年第36期60-67,共8页材料科学技术（英文版）

基　　金：supported by the Guangdong Basic and Applied Basic Research Foundation(No.2019A1515110538);Dongguan Science and Technology of Social Development Program(No.20211800904642);the open research fund of Guangdong Provincial Key Laboratory of Distributed Energy Systems(No.2020DES2);Joint Science Foundation of Wuyi University and HK and Macao(2019WGALH14);Guangdong province innovation and strong school project(2020ZDZX2004)。

摘　　要：Stibium(Sb)metal with high theoretic capacity,suitable negative working window and inexpensive nature are promising anode material for advanced aqueous alkaline batteries(AABs).However,the further development of Sb anode is severely hindered by the low capacity and poor rate capability which is originated from deficient adsorption of[Sb(OH)_(4)]^(-)and its sluggish desolvation kinetics.Herein,a nitrogen doped carbon cages(NCCs)substrate is constructed as high capacity and rate capability anode by promoting the adsorption and following desolvation process of[Sb(OH)_(4)]^(-)via the enhanced attraction toward(OH)-in the solvated[Sb(OH)_(4)]^(-).Consequently,the designed Sb/NCCs anode delivers a high capacity of 627 m Ah g^(-1)with an average 95%Sb utilization,an outstanding coulombic efficiency(CE)of 95%and an impressive lifespan(>110 h).Meanwhile,the Ni_(3)Se_(2)//Sb/NCCs batteries show great capacity retention of 86.7%after 2000 cycles with an areal capacity of 0.52 m Ah cm^(-2).Implementation of the designed anode allows for the construction of Sb-based AABs with enhanced rate capability,energy density and cycling performance.

关 键 词：Aqueous alkaline batteries Stibium anode N-doped carbon Ion adsorption Desolvation kinetics 

分 类 号：TG146.18[一般工业技术—材料科学与工程] TM911.14[金属学及工艺—金属材料]