A Dealloying Synthetic Strategy for Nanoporous Bismuth-Antimony Anodes for Sodium Ion Batteries

被引:191
|
作者
Gao, Hui [1 ]
Niu, Jiazheng [1 ]
Zhang, Chi [2 ]
Peng, Zhangquan [2 ,3 ]
Zhang, Zhonghua [1 ,2 ]
机构
[1] Shandong Univ, Sch Mat Sci & Engn, Key Lab Liquid Solid Struct Evolut & Proc Mat, Minist Educ, Jingshi Rd 17923, Jinan 250061, Shandong, Peoples R China
[2] Wuyi Univ, Sch Appl Phys & Mat, 22 Dongcheng Village, Jiangmen 529020, Peoples R China
[3] Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Electroanalyt Chem, Changchun 130022, Jilin, Peoples R China
基金
中国国家自然科学基金;
关键词
sodium ion batteries; bismuth-antimony anodes; dealloying; cycling performance; operando X-ray diffraction; X-RAY-DIFFRACTION; IN-SITU XRD; NA-ION; LITHIUM-ION; HIGH-ENERGY; LI-ION; ELECTROCHEMICAL PERFORMANCE; STORAGE MECHANISM; CATHODE MATERIAL; LARGE-CAPACITY;
D O I
10.1021/acsnano.8b00643
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Metal-based anodes have recently aroused much attention in sodium ion batteries (SIBs) owing to their high theoretical capacities and low sodiation potentials. However, their progresses are prevented by the inferior cycling performance caused by severe volumetric change and pulverization during the (de)sodiation process. To address this issue, herein an alloying strategy was proposed and nanoporous bismuth (Bi)-antimony (Sb) alloys were fabricated by dealloying of ternary Mg-based precursors. As an anode for SIBs, the nanoporous Bi2Sb6 alloy exhibits an ultralong cycling performance (10 000 cycles) at 1 A/g corresponding to a capacity decay of merely 0.0072% per cycle, due to the porous structure, alloying effect and proper Bi/Sb atomic ratio. More importantly, a (de)sodiation mechanism ((Bi,Sb) <-> Na(Bi,Sb) <-> Na-3(Bi,Sb)) is identified for the discharge/charge processes of Bi-Sb alloys by using operando X-ray diffraction and density functional theory calculations.
引用
收藏
页码:3568 / 3577
页数:10
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