Nickel–zinc(Ni–Zn) batteries hold a lot of promise for energy storage thanks to their high output voltage, plentiful Zn supply, and low toxicity. Achieving the facile preparation of high-performance cathodes at ambi...Nickel–zinc(Ni–Zn) batteries hold a lot of promise for energy storage thanks to their high output voltage, plentiful Zn supply, and low toxicity. Achieving the facile preparation of high-performance cathodes at ambient temperature remains a challenge, it is however essential for practical applications. Here, in the present study, an efficient ultrasound-assisted one-step fabrication of CoNi double hydroxide(UACoNi DH) microspheres at room temperature that performs well as a cathode for Ni–Zn batteries was proposed. This designed ultrasound-assisted method induces the formation of metal double hydroxide with an elevation of interlayer spacing and bulk conductivity while maintaining the structure features of CoNi DH prepared without ultrasound assistance. As a result, the UA-CoNi DH as an electrode material displays highly enhanced electrochemical properties relative to CoNi DH prepared without ultrasound assistance. Benefitting from the improved performance of our UA-CoNi DH electrode, the Ni–Zn battery with UA-CoNi DH as the cathode(UA-CoNi DH//Zn) delivers a good specific capacity(202.36 mAh/g) and rate performance(70.49% capacity maintained at a 10-fold higher current), presenting more than 71.61%and 21.99% improvement relative to the CoNi DH//Zn battery, respectively. This work offers guidelines for constructing high-performance Ni–Zn battery cathodes in an open environment.展开更多
基金supports from the Zhejiang Provincial Natural Science Foundation of China (No. LQ22B060003)the Fundamental Research Funds for the Provincial Universities of Zhejiang (No. 2020YQ005)+4 种基金Zhejiang Provincial Key Research and Development Project (No. 2019C02037)China Postdoctoral Science Foundation (No. 2019M662044)Research Foundation of Talented Scholars of Zhejiang A&F University (Nos. 2020FR069, 2022LFR024, 2022LFR025)National-Level College Students Innovative Entrepreneurial Training Program of Zhejiang A&F University (No. 202101341031)151 Talent Project of Zhejiang Province。
文摘Nickel–zinc(Ni–Zn) batteries hold a lot of promise for energy storage thanks to their high output voltage, plentiful Zn supply, and low toxicity. Achieving the facile preparation of high-performance cathodes at ambient temperature remains a challenge, it is however essential for practical applications. Here, in the present study, an efficient ultrasound-assisted one-step fabrication of CoNi double hydroxide(UACoNi DH) microspheres at room temperature that performs well as a cathode for Ni–Zn batteries was proposed. This designed ultrasound-assisted method induces the formation of metal double hydroxide with an elevation of interlayer spacing and bulk conductivity while maintaining the structure features of CoNi DH prepared without ultrasound assistance. As a result, the UA-CoNi DH as an electrode material displays highly enhanced electrochemical properties relative to CoNi DH prepared without ultrasound assistance. Benefitting from the improved performance of our UA-CoNi DH electrode, the Ni–Zn battery with UA-CoNi DH as the cathode(UA-CoNi DH//Zn) delivers a good specific capacity(202.36 mAh/g) and rate performance(70.49% capacity maintained at a 10-fold higher current), presenting more than 71.61%and 21.99% improvement relative to the CoNi DH//Zn battery, respectively. This work offers guidelines for constructing high-performance Ni–Zn battery cathodes in an open environment.
