Green-low-cost rechargeable aqueous zinc-ion batteries using hollow porous spinel ZnMn2O4 as the cathode material,Journal of Materials Chemistry A

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Green-low-cost rechargeable aqueous zinc-ion batteries using hollow porous spinel ZnMn2O4 as the cathode material
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2017-07-28 00:00:00 , DOI: 10.1039/c7ta00100b
Xianwen Wu _{1,

2,

3,

4,

5} , Yanhong Xiang _{1,

2,

3,

4} , Qingjing Peng _{1,

2,

3,

4,

5} , Xiangsi Wu _{1,

2,

3,

4} , Yehua Li _{1,

2,

3,

4,

5} , Fang Tang _{1,

2,

3,

4,

5} , Runci Song _{1,

2,

3,

4,

5} , Zhixiong Liu _{1,

2,

3,

4} , Zeqiang He _{1,

2,

3,

4} , Xianming Wu _{1,

2,

3,

4}

Affiliation

Rechargeable aqueous zinc-ion batteries (ZIBs) have been receiving much attention recently due to their potential large-scale applications for energy storage, although only a few cathode materials have been reported as the intercalation hosts for divalent Zn²⁺ ions. Here, we report competitive ZIBs based on hollow porous ZnMn₂O₄ as the cathode and zinc as the anode. ZnMn₂O₄ is firstly prepared through a solvothermal carbon template dispersed by polyvinyl pyrrolidone, followed by an annealing process. The galvanostatic charge–discharge measurement demonstrates that a reversible discharge capacity of 106.5 mA h g⁻¹ at 100 mA g⁻¹ after 300 cycles can be achieved with no capacity decay after the addition of 0.05 mol L⁻¹ of MnSO₄ into the electrolyte. Meanwhile, it exhibits a high capacity of 70.2 mA h g⁻¹ at a large current density of 3200 mA g⁻¹. The excellent cycle and rate performances are attributed to the synergistic effect of the deficient spinel structure of hollow porous ZnMn₂O₄ with residual carbon distribution and the inhibition of Mn dissolution during the charge/discharge process.

中文翻译：

使用空心尖晶石ZnMn ₂ O ₄作为正极材料的绿色低成本可再充电水性锌离子电池

可充电的水性锌离子电池（ZIBs）由于其潜在的大规模储能应用而受到近来的关注，尽管据报道只有很少的阴极材料作为二价Zn ²⁺离子的嵌入主体。在这里，我们报告竞争性ZIBs基于中空多孔ZnMn ₂ O ₄作为阴极，锌作为阳极。ZnMn ₂ O ₄首先通过由聚乙烯吡咯烷酮分散的溶剂热碳模板制备，然后进行退火工艺。恒电流充放电测定表明106.5毫安Hg的可逆放电容量^-1在100mA克^-1在向电解液中添加0.05 mol L ^-1的MnSO ₄之后，可以实现300个循环后的容量不变，而不会发生容量衰减。同时，它在3200 mA g ^-1的大电流密度下表现出70.2 mA hg ^-1的高容量。优异的循环性能和倍率性能归因于空心多孔ZnMn ₂ O _4的尖晶石结构缺陷与残余碳分布的协同效应，以及在充电/放电过程中抑制了Mn的溶解。

更新日期：2017-08-29

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