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Tunable Layered (Na,Mn)V8O20·nH2O Cathode Material for High-Performance Aqueous Zinc Ion Batteries.
Advanced Science ( IF 14.3 ) Pub Date : 2020-05-28 , DOI: 10.1002/advs.202000083 Min Du 1 , Chaofeng Liu 2 , Feng Zhang 1 , Wentao Dong 1 , Xiaofei Zhang 1 , Yuanhua Sang 1 , Jian-Jun Wang 1 , Yu-Guo Guo 3 , Hong Liu 1, 4 , Shuhua Wang 1
Advanced Science ( IF 14.3 ) Pub Date : 2020-05-28 , DOI: 10.1002/advs.202000083 Min Du 1 , Chaofeng Liu 2 , Feng Zhang 1 , Wentao Dong 1 , Xiaofei Zhang 1 , Yuanhua Sang 1 , Jian-Jun Wang 1 , Yu-Guo Guo 3 , Hong Liu 1, 4 , Shuhua Wang 1
Affiliation
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Rechargeable aqueous zinc‐ion batteries (ZIBs) show promise for use in energy storage. However, the development of ZIBs has been plagued by the limited cathode candidates, which usually show low capacity or poor cycling performance. Here, a reversible Zn//(Na,Mn)V8O20·n H2O system is reported, the introduction of manganese (Mn) ions in NaV8O20 to form (Na,Mn)V8O20 exhibits an outstanding electrochemical performance with a capacity of 377 mA h g−1 at a current density of 0.1 A g−1. Through experimental and theoretical results, it is discovered that the outstanding performance of (Na,Mn)V8O20·n H2O is ascribed to the Mn2+/Mn3+‐induced high electrical conductivity and Na+‐induced fast migration of Zn2+. Other cathode materials derived from (Na,Mn)V8O20·n H2O by substituting Mn with Fe, Co, Ni, Ca, and K are explored to confirm the unique advantages of transition metal ions. With an increase in Mn content in NaV8O20, (Na0.33,Mn0.65)V8O20 ·n H2O can deliver a reversible capacity of 150 mA h g−1 and a capacity retention of 99% after 1000 cycles, which may open new opportunities for the development of high‐performance aqueous ZIBs.
中文翻译：
用于高性能水系锌离子电池的可调层状(Na,Mn)V8O20·nH2O正极材料。
可充电水性锌离子电池（ZIB）显示出在储能领域的应用前景。然而，ZIB的发展一直受到正极候选材料有限的困扰，这些正极候选材料通常表现出较低的容量或较差的循环性能。在此，报道了可逆的Zn//(Na,Mn)V 8 O 20 · n H 2 O体系，在NaV 8 O 20中引入锰(Mn)离子形成(Na,Mn)V 8 O 20表现出优异的电化学性能，在0.1 A g -1的电流密度下容量为377 mA hg -1。通过实验和理论结果发现(Na,Mn)V 8 O 20 · n H 2 O的优异性能归因于Mn 2+ /Mn 3+诱导的高电导率和Na +诱导的快速电导率。 Zn 2+的迁移。探索了用Fe、 Co、 Ni、 Ca和K取代Mn而衍生的其他正极材料，以证实过渡金属离子的独特优势。随着NaV 8 O 20中Mn含量的增加，(Na 0.33 ,Mn 0.65 )V 8 O 20 · n H 2 O可提供150 mA hg -1的可逆容量，1000次循环后容量保持率为99%，这可能为高性能水性ZIB的开发带来新的机遇。
更新日期：2020-07-08
中文翻译：
用于高性能水系锌离子电池的可调层状(Na,Mn)V8O20·nH2O正极材料。
可充电水性锌离子电池（ZIB）显示出在储能领域的应用前景。然而，ZIB的发展一直受到正极候选材料有限的困扰，这些正极候选材料通常表现出较低的容量或较差的循环性能。在此，报道了可逆的Zn//(Na,Mn)V 8 O 20 · n H 2 O体系，在NaV 8 O 20中引入锰(Mn)离子形成(Na,Mn)V 8 O 20表现出优异的电化学性能，在0.1 A g -1的电流密度下容量为377 mA hg -1。通过实验和理论结果发现(Na,Mn)V 8 O 20 · n H 2 O的优异性能归因于Mn 2+ /Mn 3+诱导的高电导率和Na +诱导的快速电导率。 Zn 2+的迁移。探索了用Fe、 Co、 Ni、 Ca和K取代Mn而衍生的其他正极材料，以证实过渡金属离子的独特优势。随着NaV 8 O 20中Mn含量的增加，(Na 0.33 ,Mn 0.65 )V 8 O 20 · n H 2 O可提供150 mA hg -1的可逆容量，1000次循环后容量保持率为99%，这可能为高性能水性ZIB的开发带来新的机遇。
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