Aqueous alkaline rechargeable batteries(ARBs)have huge potential in energy storage equipment because of their low cost,safety and high ionic conductivity.However,the performance of actual ARBs is largely limited by el...Aqueous alkaline rechargeable batteries(ARBs)have huge potential in energy storage equipment because of their low cost,safety and high ionic conductivity.However,the performance of actual ARBs is largely limited by electrode materials.Here,the CoNiMn-LDH cathode with a hollow cubic structure and the Bi_(2)O_(3) anode with a rod-shaped structure were successfully prepared using MOFs as templates.Compared with binary CoNi-LDH,the ternary CoNiMn-LDH has a larger voltage window,higher capacity,and faster charge transport dynamics and ion diffusion dynamics.A full battery was assembled with CoNiMn-LDH and Bi_(2)O_(3),and exhibited a high specific capacity of 247.32 mA h g^(−1) at 1 A g^(−1).It exhibited cycling stability for up to 1400 cycles and its capacity retention was 87% at 4 A g^(−1).In addition,a high energy density of 120 W h kg^(−1) could also be achieved at a power density of 4219 W kg^(−1).This study provides an instructive paradigm for the design and preparation of advanced electrode materials for full batteries.展开更多
基金supported by the National Natural Science Foundation of China(22269024)Ph.D.Research Startup Foundation of Yan’an University(YDBK2020-22)+1 种基金Technology Innovation Leading Program of Shaanxi(2022QFY07-04)Joint Project between Department of Science&Technology and the Local Government in Shaanxi(2022GD-TSL-66,2022GD-TSL-68).
文摘Aqueous alkaline rechargeable batteries(ARBs)have huge potential in energy storage equipment because of their low cost,safety and high ionic conductivity.However,the performance of actual ARBs is largely limited by electrode materials.Here,the CoNiMn-LDH cathode with a hollow cubic structure and the Bi_(2)O_(3) anode with a rod-shaped structure were successfully prepared using MOFs as templates.Compared with binary CoNi-LDH,the ternary CoNiMn-LDH has a larger voltage window,higher capacity,and faster charge transport dynamics and ion diffusion dynamics.A full battery was assembled with CoNiMn-LDH and Bi_(2)O_(3),and exhibited a high specific capacity of 247.32 mA h g^(−1) at 1 A g^(−1).It exhibited cycling stability for up to 1400 cycles and its capacity retention was 87% at 4 A g^(−1).In addition,a high energy density of 120 W h kg^(−1) could also be achieved at a power density of 4219 W kg^(−1).This study provides an instructive paradigm for the design and preparation of advanced electrode materials for full batteries.
