Cobalt-Doped Layered MnO2 Thin Film Electrochemically Grown on Nitrogen-Doped Carbon Cloth for Aqueous Zinc-Ion Batteries,ACS Applied Energy Materials

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Cobalt-Doped Layered MnO2 Thin Film Electrochemically Grown on Nitrogen-Doped Carbon Cloth for Aqueous Zinc-Ion Batteries
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2020-04-24 00:00:00 , DOI: 10.1021/acsaem.0c00357
Fuga Kataoka ₁ , Tomoya Ishida ₁ , Kenji Nagita ₁ , Vijay Kumbhar ₁ , Kazuhiro Yamabuki ₁ , Masaharu Nakayama _{1,

2}

Affiliation

The layered manganese dioxide (δ-type MnO₂) film electrodeposited on carbon cloth (CC) functioned as a cathode in aqueous zinc-ion batteries. Battery performance was notably improved by doping MnO₂ layers with cobalt and the CC surface with nitrogen. The δ-MnO₂ interlayer accommodated Zn²⁺ ions in the as-deposited state and thus could act as an intercalation host during the discharging process. The Co-doped MnO₂ film on the nitrogen-doped CC delivered a discharge capacity as high as 280 mA h g^–1 at a specific current of 1.2 A g^–1 for 600 charge/discharge cycles, while the discharge capacity did not exceed 30 mA h g^–1 even at a specific current as high as 10.5 A g^–1. These values are superior to those observed in the absence of doping, demonstrating the positive impact of Co- and N-doping into the MnO₂ layers and the CC substrate on the cycling stability and rate capability.

中文翻译：

氮掺杂碳布上电化学沉积钴掺杂层状MnO ₂薄膜，用于水性锌离子电池

电沉积在碳布（CC）上的层状二氧化锰（δ型MnO ₂）膜在水性锌离子电池中用作阴极。通过用钴掺杂MnO ₂层和使用氮掺杂CC表面，电池性能得到了显着改善。将δ的MnO ₂层间容纳的Zn ²⁺离子在as-depo的状态，并且因此可以作为在放电过程中的嵌入主体。氮掺杂CC上的Co掺杂MnO ₂膜在600 A的充电/放电循环中，在1.2 A g ^–1的比电流下，放电容量高达280 mA hg ^–1，而放电容量不超过30 mA汞^–1即使在高达10.5 A g ^–1的特定电流下。这些值优于在没有掺杂的情况下观察到的值，这表明Co和N掺杂到MnO ₂层和CC衬底中对循环稳定性和倍率性能具有积极影响。

更新日期：2020-04-24

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