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Anchoring Polar Organic Molecules in Defective Ammonium Vanadate for High-Performance Flexible Aqueous Zinc-Ion Battery
Small ( IF 13.0 ) Pub Date : 2023-08-30 , DOI: 10.1002/smll.202304462 Shuo Kong 1 , Yuxin Li 1 , Xiaojie Zhang 1 , Ziming Xu 1 , Xianzhen Wang 1 , Yongbao Feng 1 , Wenbin Gong 2 , Chenglong Liu 3 , Konghu Tian 4 , Qiulong Li 1
Small ( IF 13.0 ) Pub Date : 2023-08-30 , DOI: 10.1002/smll.202304462 Shuo Kong 1 , Yuxin Li 1 , Xiaojie Zhang 1 , Ziming Xu 1 , Xianzhen Wang 1 , Yongbao Feng 1 , Wenbin Gong 2 , Chenglong Liu 3 , Konghu Tian 4 , Qiulong Li 1
Affiliation
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Ammonium vanadate (NVO) often has unsatisfactory electrochemical performance due to the irreversible removal of NH4+ during the reaction. Herein, layered DMF-NVO nanoflake arrays (NFAs) grown on highly conductive carbon cloth (CC) are employed as the binder-free cathode (DMF-NVO NFAs/CC), which produces an enlarged interlayer spacing of 12.6 Å (against 9.5 Å for NH4V4O10) by effective N, N-dimethylformamide (DMF) intercalation. Furthermore, the strong attraction of highly polar carbonyl and ammonium ions in DMF can stabilize the lattice structure, and low-polar alkyl groups can interact with the weak electrostatic generated by Zn2+, which allows Zn2+ to be freely intercalated. The DMF-NVO NFAs/CC//Zn battery exhibits an impressive high capacity of 536 mAh g−1 at 0.5 A g−1, excellent rate capability, and cycling performance. The results of density functional theory simulation demonstrate that the intercalation of DMF can significantly reduce the band gap and the diffusion barrier of Zn2+, and can also accommodate more Zn2+. The assembled flexible aqueous rechargeable zinc ion batteries (FARZIBs) exhibit outstanding energy density and power density, up to 436 Wh kg−1 at 400 W kg−1, and still remains 180 Wh kg−1 at 4000 W kg−1. This work can provide a reference for the design of cathode materials for high-performance FARZIBs.
中文翻译：
将极性有机分子锚定在有缺陷的钒酸铵中用于高性能柔性水系锌离子电池
由于反应过程中NH 4 +的不可逆脱除，钒酸铵(NVO)的电化学性能往往不理想。在此，采用在高导电碳布（CC）上生长的层状 DMF-NVO 纳米片阵列（NFA）作为无粘合剂阴极（DMF-NVO NFA/CC），其产生了 12.6 Å 的扩大层间距（相对于 9.5 Å） (NH 4 V 4 O 10 )通过有效的N,N-二甲基甲酰胺(DMF)插层。此外，DMF中高极性的羰基和铵离子的强吸引力可以稳定晶格结构，而低极性的烷基可以与Zn 2+产生的弱静电相互作用，从而使Zn 2+能够自由插层。 DMF-NVO NFAs/CC//Zn电池在0.5 A g -1时表现出令人印象深刻的536 mAh g -1的高容量、优异的倍率性能和循环性能。密度泛函理论模拟结果表明，DMF的插层可以显着降低Zn 2+的带隙和扩散势垒，并且可以容纳更多的Zn 2+ 。组装的柔性水性可充电锌离子电池（FARZIB）表现出出色的能量密度和功率密度，在400 W kg -1时高达436 Wh kg -1 ，在4000 W kg -1时仍保持180 Wh kg -1 。该工作可为高性能FARZIBs正极材料的设计提供参考。
更新日期：2023-08-30
中文翻译：
将极性有机分子锚定在有缺陷的钒酸铵中用于高性能柔性水系锌离子电池
由于反应过程中NH 4 +的不可逆脱除，钒酸铵(NVO)的电化学性能往往不理想。在此，采用在高导电碳布（CC）上生长的层状 DMF-NVO 纳米片阵列（NFA）作为无粘合剂阴极（DMF-NVO NFA/CC），其产生了 12.6 Å 的扩大层间距（相对于 9.5 Å） (NH 4 V 4 O 10 )通过有效的N,N-二甲基甲酰胺(DMF)插层。此外，DMF中高极性的羰基和铵离子的强吸引力可以稳定晶格结构，而低极性的烷基可以与Zn 2+产生的弱静电相互作用，从而使Zn 2+能够自由插层。 DMF-NVO NFAs/CC//Zn电池在0.5 A g -1时表现出令人印象深刻的536 mAh g -1的高容量、优异的倍率性能和循环性能。密度泛函理论模拟结果表明，DMF的插层可以显着降低Zn 2+的带隙和扩散势垒，并且可以容纳更多的Zn 2+ 。组装的柔性水性可充电锌离子电池（FARZIB）表现出出色的能量密度和功率密度，在400 W kg -1时高达436 Wh kg -1 ，在4000 W kg -1时仍保持180 Wh kg -1 。该工作可为高性能FARZIBs正极材料的设计提供参考。
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