A Long-Cycling Aqueous Zinc-Ion Pouch Cell: NASICON-Type Material and Surface Modification.,Chemistry - An Asian Journal

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A Long-Cycling Aqueous Zinc-Ion Pouch Cell: NASICON-Type Material and Surface Modification.
Chemistry - An Asian Journal ( IF 3.5 ) Pub Date : 2020-03-30 , DOI: 10.1002/asia.202000162
Xianghua Zhang ₁ , Haoliang Chen ₁ , Weiling Liu ₂ , Ni Xiao ₃ , Qi Zhang ₁ , Xianhong Rui _{1,

4} , Shaoming Huang ₁

Affiliation

Aqueous zinc-ion batteries (ZIBs) have become the highest potential energy storage system for large-scale applications owing to the high specific capacity, good safety and low cost. In this work, a NASICON-type Na3 V2 (PO4 )3 cathode modified by a uniform carbon layer (NVP/C) has been synthesized via a facile solid-state method and exhibited significantly improved electrochemical performance when working in an aqueous ZIB. Specifically, the NVP/C cathode shows an excellent rate capacity (e. g., 48 mAh g-1 at 1.0 A g-1 ). Good cycle stability is also achieved (e. g., showing a capacity retention of 88% after 2000 cycles at 1.0 A g-1 ). Furthermore, the Zn2+ (de)intercalation mechanism in the NVP cathode has been determined by various ex-situ techniques. In addition, a Zn||NVP/C pouch cell has been assembled, delivering a high capacity of 89 mAhg-1 at 0.2 A g-1 and exhibiting a superior long cycling stability.

中文翻译：

长周期水性锌离子袋式电池：NASICON型材料和表面改性。

锌离子水电池（ZIBs）由于具有高的比容量，良好的安全性和低成本而已成为大规模应用中最具潜力的储能系统。在这项工作中，已经通过一种简便的固态方法合成了由均匀碳层（NVP / C）改性的NASICON型Na3 V2（PO4）3阴极，并且在ZIB水溶液中工作时表现出明显改善的电化学性能。具体而言，NVP / C阴极显示出优异的倍率容量（例如，在1.0A g-1下为48mAh g-1）。还实现了良好的循环稳定性（例如，在1.0A g-1下2000次循环后显示88％的容量保持率）。此外，已通过各种异位技术确定了NVP阴极中的Zn2 +（脱）嵌入机理。另外，已经组装了Zn || NVP / C袋式电池，

更新日期：2020-03-30

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