Lithium storage performance of α-Ni(OH)2 regulated by partial interlayer anion exchange

Autor: Renshu Huang, Shunhua Xiao, Jiqiong Jiang, Yanwei Li, Jinhuan Yao
Rok vydání: 2021
Předmět:
Zdroj: Ionics. 27:1125-1135
ISSN: 1862-0760
0947-7047
DOI: 10.1007/s11581-020-03889-8
Popis: Hierarchical flower-like α-Ni(OH)2 with interlayer NO3− is prepared via a homogeneous precipitation method. To optimize the lithium storage performance of the α-Ni(OH)2 sample, the interlayer NO3− is partially exchanged by Cl−, SO42−, CO32−, PO43−, and OH−, respectively. The results demonstrate that the α-Ni(OH)2 samples exchanged by SO42−, CO32−, Cl−, and OH− exhibit improved rate capability and enhanced pseudocapacitive behavior. The α-Ni(OH)2 with interlayer NO3− and the ones exchanged by SO42− and Cl− suffer from poor cyclic stability after 50 cycles at a current density of 1.0 A g−1. In contrast, the α-Ni(OH)2 samples exchanged by CO32−, PO43−, and OH− exhibit much-enhanced cyclic stability compared to the α-Ni(OH)2 with interlayer NO3−. The α-Ni(OH)2 with interlayer NO3− and the ones exchanged by SO42− and Cl− deliver capacities of 265, 197, and 341 mA h g−1, respectively, after 500 cycles at a current density of 1.0 A g−1, while the α-Ni(OH)2 samples exchanged by CO32−, PO43−, and OH− maintain reversible capacities of 980, 1172, and 879 mA h g−1, respectively, after 500 cycles at a current density of 1.0 A g−1. This work provides a new avenue for the rational design and performance optimization of α-Ni(OH)2 as an anode material for lithium-ion batteries.
Databáze: OpenAIRE
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