Flexible quasi-solid zinc-ion batteries(ZIBs)have large potential in power applications due to the low price,wearable nature,safety,and high capacity.However,the use of transition metal sulfide cathodes in ZIBs has not been studied extensively and the underlying mechanism and theoretical basis of this type of batteries are not well understood.Herein,a highly active cobalt-doped Ni3S2 porous nanocone frame-work(C12NS)is designed and demonstrated as a zinc-ion battery electrode.First-principles calculation and experiments reveal that the cobalt dopant improves the battery properties greatly.The assembled flexible zinc-ion battery exhibits a high specific capacity of 453.3 mAh g-1 at a current density of 0.4 A g-1 in as well as excellent cycling stability as manifested by a capacity retention ratio of 89.5％at a current density of 4 A g-1 after 5000 cycles.The peak energy density of 553.9 Wh kg-1 is also superior to those of most recently reported NiCo-based zinc-ion batteries.More importantly,the flexible battery can be oper-ated under severe mechanical bending and even continues to work after physical puncturing without showing leakage.These exciting results not only reveal a novel design of cathode materials for zinc-based batteries,but also suggest their immense commercial potential in portable and wearable electronics.

Xin Tong;Yun Li;Ning Pang;Yang Zhou;Dajun Wu;Dayuan Xiong;Shaohui Xu;Lianwei Wang;Paul K.Chu

Key Laboratory of Polar Materials and Devices(MOE),Department of Electronics,East China Normal University,Shanghai 200241,China;Department of Physics,Department of Materials Science and Engineering,and Department of Biomedical Engineering,City University of Hong Kong,Kowloon 999077,Hong Kong,China;School of Physics and Electronic Engineering,Hanshan Normal University,Chaozhou 521041,Guangdong,China;Jiangsu Laboratory of Advanced Functional Materials,School of Electronic and Information Engineering,Changshu Institute of Technology,Changshu 215500,Jiangsu,China

能源化学

[1]Xin Tong;Yun Li;Ning Pang;Yang Zhou;Dajun Wu;Dayuan Xiong;Shaohui Xu;Lianwei Wang;Paul K.Chu-.Highly active cobalt-doped nickel sulfide porous nanocones for high-performance quasi-solid-state zinc-ion batteries)[J].能源化学,2022(03):237-249

nanocones,nanocone,C12NS,puncturing

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