N-doped δ-MnO2 coated N-doped carbon cloth as stable cathode for aqueous zinc-ion batteries
2023; Elsevier BV; Volume: 18; Issue: 2 Linguagem: Inglês
10.1016/j.ijoes.2023.01.003
ISSN1452-3981
AutoresShiru Le, Baozexi Yan, Yachun Mao, Dazhao Chi, Min Zhu, Hongyu Jia, Guangyu Zhao, Xiaodong Zhu, Naiqing Zhang,
Tópico(s)Advanced Battery Materials and Technologies
ResumoThe rapidly growing demand for energy storage has led to an increasing interest in advanced batteries. Aqueous-based rechargeable zinc-ion batteries have attracted considerable attention owing to their low cost, good safety, and environmental friendliness. MnO2 is a promising cathode material for zinc ion batteries; however, its application is severely restricted because of its poor electrical conductivity and manganese dissolution. Herein, a nitrogen-doped layered δ-manganese dioxide coated on nitrogen-doped carbon cloth (N-CC@N-MnO2) is developed as a cathode material for zinc ion batteries via a facile hydrothermal method. Nitrogen doping in MnO2 effectively improves its oxygen vacancy concentration. Consequently, this improves H+ adsorption to enhance the capacity storage; further, it inhibits manganese dissolution. N-CC@N-MnO2 delivers a high-capacity retention of 94.6% even after 2000 cycles at 0.1 A·g–1, whereas that of the counterpart without N-doping (CC@MnO2) is only 40.5% after 1000 cycles. Moreover, N-CC@N-MnO2 achieves a capacity of 402 mAh·g–1 compared with only 163.2 mAh·g–1 achieved by CC@MnO2.
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