A potential large-scale energy conversion/storage system: an aqueous rechargeable battery with intercalated potassium compound
A potential large-scale energy conversion/storage system: an aqueous rechargeable battery with intercalated potassium compound
复制标题
潜在的大规模能量转换/存储系统：插层钾化合物的水系可充电电池
DOI：
10.1007/s11581-018-2612-5
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发表时间：
2018
期刊：
影响因子：
2.8
通讯作者：
Xianming Wu
中科院分区：
文献类型：
--
作者：
Fang Tang;Xianwen Wu;Rongheng Shi;Yongqiang Shen;Xianming Wu
本文报道了以K0.17MnO2为阴极，锌为阳极，电解液中含有多种金属离子的Zn/K0.17MnO2可充水溶液电池。采用水热法合成了K 0. 17 MnO 2微球，该微球由直径约200 nm的棒状大颗粒组成，在500 °C空气中煅烧2 h。循环伏安测试表明，与钾离子相比，锌离子半径较小，更容易嵌入阴极。恒流充放电测试表明，在100 mA g− 1下，加入0.05 mol L− 1 MnSO 4后，其初始放电容量为189.3 mAh g− 1。同时，在3200 mA g-1的电流密度下，放电容量仍然保持高达78.4 mAh g-1，表明比没有添加剂的循环稳定性好得多，并且具有超快离子传输特性。
Here, we report the rechargeable aqueous battery of Zn/K0.17MnO2with multiple metal ions in the electrolyte based on K0.17MnO2as the cathode and zinc as the anode. The microspheres of broccoli-like K0.17MnO2made up of large rod particles with a size of about 200 nm in diameter are synthesized by hydrothermal method followed by calcination at 500 °C in air for 2 h. The cyclic voltammetry measurement demonstrates that it is easy to intercalate into the cathode for zinc ions with smaller radius compared with potassium ions. The galvanostatic charge/discharge test displays that it delivers the initial discharge capacity of 189.3 mAh g−1at 100 mA g−1after adding 0.05 mol L−1MnSO4into the hybrid electrolyte. Meanwhile, the discharge capacity retains still up to 78.4 mAh g−1at a current density of 3200 mA g−1, indicating the much better cycle stability than that without additive and the superfast ion transport characteristic.