Nickel Cobalt Pyrophosphate Porous Microplates for High Performance and Durable Charge Storage
Nickel Cobalt Pyrophosphate Porous Microplates for High Performance and Durable Charge Storage
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用于高性能和持久电荷存储的焦磷酸镍钴多孔微孔板
DOI：
10.1166/sam.2019.3462
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发表时间：
2019-03
影响因子：
0.9
通讯作者：
Zhao Yufeng
中科院分区：
文献类型：
--
作者：
Wang Bo;Yu Yang;Zhang Xuejiao;Wang Qingjie;Zhao Yufeng
通过对磷酸镍钴铵单晶的后处理，制备了焦磷酸镍钴多孔微孔板。通过在单晶微板上形成多孔结构，可以引入更多的电子缺陷，从而增加离子电导率和电荷转移通道。因此，当在1 M KOH电解液中作为电极测试时，所制备的材料表现出优异的电化学性能。具体地，在1A g-1的电流密度下实现了185.2mAh g-1的高记录高比容量，其在10A g-1的电流密度下保持为181.6mAh g-1。令人鼓舞的是，该材料还表现出显着的循环稳定性，在5 A g-1下进行5000次充电/放电循环后，容量保持率为68.5%。
Nickel cobalt pyrophosphate porous microplate is prepared through the post-treatment of single-crystal NH4–Ni–Co phosphate. By creating porous structure on the single crystal microplate, more electronic defects can be introduced, and thus increase the ionic conductivity and charge transfer channels. Consequently, the asprepared material exhibits outstanding electrochemical performance when tested as electrode in 1 M KOH electrolyte. Specifically, a high record high specific capacity of 185.2 mAh g–1 is achieved at a current density of 1 A g–1, which remains 181.6 mAh g–1 at the current density of 10 A g–1. Promisingly, the material also demonstrates a remarkable cycling stability with 68.5% capacity retention after 5000 charge/discharge cycles at 5 A g–1.