A self-reconstructed (oxy)hydroxide@nanoporous metal phosphide electrode for high-performance rechargeable zinc batteries
A self-reconstructed (oxy)hydroxide@nanoporous metal phosphide electrode for high-performance rechargeable zinc batteries
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用于高性能可充电锌电池的自重构(氧)氢氧化物@纳米孔金属磷化物电极
DOI：
10.1039/c9ta07910f
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发表时间：
2019-10-07
影响因子：
11.9
通讯作者：
Tan, Yongwen
中科院分区：
文献类型：
--
作者：
Jiang, Yao;Peng, Ming;Tan, Yongwen
可充电水性锌电池由于其高容量、低成本和良好的安全性而引起了极大的关注。然而，它们有限的界面动力学和较差的倍率性能限制了它们的应用。在这里，采用自重构（氧）氢氧化物@纳米多孔Ni3P作为自支撑无粘合剂正极，制造了一种新型Ni//Zn可充电电池。 (氧)氢氧化物@纳米多孔Ni3P电极的面积比容量为0.501 mA h cm(-2)，体积比容量为167.0 mA h cm(-3)，碱性锌电池的能量密度为15.38 mW h cm(-3)，功率密度为4.15 W cm(-3)，高于大多数文献报道的值。受益于自支撑电极的良好导电性、无定形（羟基）氢氧化物的有效界面电荷转移以及通过无粘合剂电极中的孔道的快速离子扩散，Ni//Zn电池表现出优异的倍率性能和循环稳定性（6000次循环后保留率为94%）。结合其良好的电化学稳定性和优异的倍率性能，这种新型电极在高容量可充电锌电池中显示出巨大的应用潜力。
Rechargeable aqueous zinc batteries have attracted tremendous attention due to their remarkable high capacity, low cost, and good safety. However, their limited interfacial kinetics and poor rate performance have limited their application. Here, a new type of Ni//Zn rechargeable battery is fabricated with self-reconstructed (oxy)hydroxide@nanoporous Ni3P as a self-supported binder-free cathode. The (oxy)hydroxide@nanoporous Ni3P electrode exhibits an area specific capacity of 0.501 mA h cm(-2) and a volume specific capacity of 167.0 mA h cm(-3), and the alkali Zn battery achieves an energy density of 15.38 mW h cm(-3) and a power density of 4.15 W cm(-3), which are higher than most values reported in the literature. Benefiting from the good conductivity of the self-supported electrode, the efficient interfacial charge transfer of amorphous (oxy)hydroxide and fast ion diffusion via the pore channels in the binder-free electrode, the Ni//Zn battery exhibits excellent rate capability and cycling stability (94% retention after 6000 cycles). Combined with its good electrochemical stability and excellent rate performance, this novel electrode shows tremendous potential for application in high-capacity rechargeable Zn batteries.