Co3+-Regulated electronic structure of NiCo2Sx nanoneedle arrays as high-rate cathode materials for durable alkaline Ni–Zn batteries
Co3+-Regulated electronic structure of NiCo2Sx nanoneedle arrays as high-rate cathode materials for durable alkaline Ni–Zn batteries
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DOI：
10.1016/j.jpowsour.2023.233998
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发表时间：
2024-02
影响因子：
9.2
通讯作者：
Ke Qian;Xiaodong Liang;Qin Liu;Jingying Li;Yisheng Gan;Jia Yao;Junjie Zheng;Ziang Wu
中科院分区：
文献类型：
--
作者：
Ke Qian;Xiaodong Liang;Qin Liu;Jingying Li;Yisheng Gan;Jia Yao;Junjie Zheng;Ziang Wu
碱性锌基电池以其高的能量密度和安全性成为当前的研究热点，但其低的循环稳定性和倍率性能限制了其商业化应用。本文基于阴离子交换反应，采用不同硫化浓度制备了垂直有序的NiCo2Sx纳米针阵列。高度均匀的纳米针阵列提供了快速的离子传输路径和丰富的活性中心，所制备的NiCo2Sx@Ni泡沫(NiCo2Sx@Nf)电极具有优异的容量(121.9 mAhg−1)、稳定的循环性能(500次循环后容量保持率的91.1%)、最大能量密度636.3 Wh kg−1和最大功率密度40.9kW/kg−1。为制备耐用碱性镍锌电池正极材料提供了更精确和准确的思路。
Alkaline zinc-based batteries have become a current research hotspot due to their high energy density and safety, but their low cycle stability and rate performance limit their commercial applications. Herein, vertically ordered NiCo2Sxnanoneedle arrays are prepared using different sulfidation concentrations based on the anion exchange reaction. The highly uniform nanoneedle arrays provide fast ion transport paths and abundant active sites, and the prepared NiCo2Sx@Ni foam (NiCo2Sx@NF) electrode has the excellent capacity (121.9 mAh g−1), stable cycle performance (91.1 % of capacity retention after 500 cycles), also achieves a maximum energy density of 636.3 Wh kg−1and a maximum power density of 40.9 kW kg−1. This paper provides a more precise and accurate idea for preparing cathode materials for durable alkaline Ni–Zn batteries.