Cryptomelane-Type KMn(8)O(16) as Potential Cathode Material - for Aqueous Zinc Ion Battery.
Cryptomelane-Type KMn(8)O(16) as Potential Cathode Material - for Aqueous Zinc Ion Battery.
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隐黑烷型 KMn8O16 作为水系锌离子电池潜在正极材料
DOI：
10.3389/fchem.2018.00352
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发表时间：
2018
影响因子：
5.5
通讯作者：
He Z
中科院分区：
文献类型：
--
作者：
Cui J;Wu X;Yang S;Li C;Tang F;Chen J;Chen Y;Xiang Y;Wu X;He Z
水溶液电池以其安全性好、功率密度高、成本低等优点在大规模储能领域得到了越来越多的关注。采用改进的水热法成功合成了隐钾矿型KMn 8 O 16，经X射线衍射（XRD）表征，并在400°C下退火3 h。通过场发射扫描电子显微镜（FE-SEM）、能谱分析（EDS）和透射电子显微镜（TEM）对所制备的KMn 8 O 16的形貌和微结构进行了研究，结果表明：KMn 8 O 16微球由长约500 nm的一维纳米棒构成，直径约0.5~2 μm。循环伏安测试结果表明，在初始放电过程中，锌离子在阴极上发生了大量的嵌入，表明锰钾矿型KMn 8 O 16可作为水溶液锌离子电池的潜在阴极材料。该电极显示出良好的循环性能，即使在100次循环后可逆容量仍高达77.0 mAh/g，并且自放电现象很小。
Aqueous battery has been gained much more interest for large-scale energy storage fields due to its excellent safety, high power density and low cost. Cryptomelane-type KMn8O16 confirmed by X-ray diffraction (XRD) was successfully synthesized by a modified hydrothermal method, followed by annealed at 400°C for 3 h. The morphology and microstructure of as-prepared KMn8O16 investigated by field-emission scanning electron microscopy (FE-SEM) with the energy spectrum analysis (EDS) and transmission electron microscopy (TEM) demonstrate that one-dimensional nano rods with the length of about 500 nm constitute the microspheres with the diameter about 0.5~2 μm. The cyclic voltammetry measurement displays that the abundant intercalation of zinc ions on the cathode takes place during the initial discharge process, indicating that cryptomelane-type KMn8O16 can be used as the potential cathode material for aqueous zinc ion batteries. The electrode shows a good cycling performance with a reversible capacity of up to 77.0 mAh/g even after 100 cycles and a small self-discharge phenomenon.