Abstract
The currently used β-Ni(OH)2 for alkaline nickel batteries are falling short of higher capacity demand. In contrast, α-Ni(OH)2 with high theoretical capacity can address this need. However, the α-Ni(OH)2 suffers from poor stability and intrinsic low electrical conductivity. Herein, we designed La/Ce-doped spherical α-Ni(OH)2 and study the effect of La/Ce on the structure and electrochemical properties of α-Ni(OH)2. The increased specific surface area of the α-Ni(OH)2 with La/Ce doping reduces the electron transfer resistance. The La/Ce-doped α-Ni(OH)2 with 2 at% La (Ni-La-2) and 3 at% Ce (Ni-Ce-3) doping deliver high capacities of ∼365 mAh g–1 and ∼373 mAh g–1, respectively, which is only 309 mAh g–1 for the pure α-Ni(OH)2. Meanwhile, the La/Ce-doping stabilizes the structural robustness of the α-Ni(OH)2 during cycling. Notably, Ni-La-2 shows a superior stable cycling life with a capacity retention of ∼95 % after 400 cycles, which is ∼20 % higher than that of pure α-Ni(OH)2.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callSimilar Papers
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
