Journal
IONICS
Volume 27, Issue 3, Pages 1125-1135Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11581-020-03889-8
Keywords
Lithium-ion batteries; alpha-Ni(OH)(2); Anode materials; Interlayer anions; Anion exchange
Funding
- Guangxi Natural Science Foundation of China [2017GXNSFAA198117]
- National Natural Science Foundation of China [22065010]
- Science and Technology Major Project of Guangxi [AA19046001]
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Different anion exchange in alpha-Ni(OH)(2) samples can enhance lithium storage performance. Samples exchanged with CO32-, PO43-, and OH- show improved cyclic stability and higher capacity.
Hierarchical flower-like alpha-Ni(OH)(2) with interlayer NO3- is prepared via a homogeneous precipitation method. To optimize the lithium storage performance of the alpha-Ni(OH)(2) sample, the interlayer NO3- is partially exchanged by Cl-, SO42-, CO32-, PO43-, and OH-, respectively. The results demonstrate that the alpha-Ni(OH)(2) samples exchanged by SO42-, CO32-, Cl-, and OH- exhibit improved rate capability and enhanced pseudocapacitive behavior. The alpha-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 alpha-Ni(OH)(2) samples exchanged by CO32-, PO43-, and OH- exhibit much-enhanced cyclic stability compared to the alpha-Ni(OH)(2) with interlayer NO3-. The alpha-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 alpha-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 alpha-Ni(OH)(2) as an anode material for lithium-ion batteries.
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