Stable bismuth-antimony alloy cathode with a conversion-dissolution/deposition mechanism for high-performance zinc batteries

Zhao，Yuwei1; Jiang，Feng2; Hong，Hu1; Wang，Donghong3; Li，Qing1; Meng，You1; Huang，Zhaodong1; Guo，Ying1; Li，Xinliang1; Chen，Ao1; Zhang，Rong1; Zhang，Shaoce1; Ho，Johnny C.1; Yao，Zhenpeng4; Liu，Weishu2; Zhi，Chunyi1,3

2021

10.1016/j.mattod.2021.09.023

Materials Today   影响因子和分区

1369-7021

1873-4103

Although a large number of intercalation cathode materials for aqueous Zn batteries have been reported, limited intercalation capacity precludes achieving a higher energy density. Here we develop a high-performance aqueous Zn battery based on BiSb alloy (BiSb) using a high-concentrated strong-basic polyelectrolyte. We demonstrate that a conversion-dissolution/deposition electrochemical mechanism (BiSb ↔ Bi + SbO ↔ Bi + SbO ↔ BiO) through in situ X-ray diffraction (XRD), Raman, and ex-situ X-ray photoelectron spectrometry (XPS) characterizations with the help of density functional theory calculations. The BiSb cathode delivers large capacity of 512 mAh g at 0.3 Ag and superior rate capability of 90 mAh g even at 20 Ag, and long-term cyclability with capacity retentions of 184 mAh g after 600 cycles at 0.5 Ag and 130 mAh g after 1300 cycles at 1 Ag. Remarkably, even at temperatures as low as −10 and −20 °C, capacities of 210 and 197 mAh g are reserved at 1 Ag, respectively. Moreover, the prepared pouch Zn//BiSb battery delivers a high energy density of 303 Wh kg at 0.3 Ag. When coupled with a high concentration polyelectrolyte, the Zn/BiSb battery exhibits an excellent performance over a wide temperature range (−40 to 40 °C). Our research reveals the metal cathode is promising for Zn batteries to achieve a high performance with the unique mechanism and alloys can be an effective approach to stabilize metal electrodes for cycling.

Bismuth-antimony alloy Conversion reaction Low temperature battery Zinc batteries

EI

英语

其他

20214511109414

Antimony alloys ; Antimony compounds ; Bismuth alloys ; Bismuth compounds ; Cathodes ; Density functional theory ; Dissolution ; Electric batteries ; Polyelectrolytes

Antimony and Alloys:546.4 ; Nonferrous Metals and Alloys excluding Alkali and Alkaline Earth Metals:549.3 ; Thermodynamics:641.1 ; Electric Batteries:702.1 ; Chemical Operations:802.3 ; Organic Polymers:815.1.1 ; Polymer Products:817.1 ; Probability Theory:922.1 ; Atomic and Molecular Physics:931.3 ; Quantum Theory; Quantum Mechanics:931.4

2-s2.0-85118331805

Scopus

1.Department of Materials Science and Engineering,City University of Hong Kong,Hong Kong
2.Department of Materials Science and Engineering,Southern University of Science and Technology,Shenzhen,China
3.Hong Kong Center for Cerebro-Cardiovascular Health Engineering (COCHE),Shatin,Hong Kong
4.Chemical Physics Theory Group,Department of Chemistry and Department of Computer Science,University of Toronto,Toronto,M5S 3H6,Canada

Zhao，Yuwei,Jiang，Feng,Hong，Hu,et al. Stable bismuth-antimony alloy cathode with a conversion-dissolution/deposition mechanism for high-performance zinc batteries[J]. Materials Today,2021,51:87-95.

Zhao，Yuwei.,Jiang，Feng.,Hong，Hu.,Wang，Donghong.,Li，Qing.,...&Zhi，Chunyi.(2021).Stable bismuth-antimony alloy cathode with a conversion-dissolution/deposition mechanism for high-performance zinc batteries.Materials Today,51,87-95.

Zhao，Yuwei,et al."Stable bismuth-antimony alloy cathode with a conversion-dissolution/deposition mechanism for high-performance zinc batteries".Materials Today 51(2021):87-95.