A Long‐Cycling Aqueous Zinc‐Ion Pouch Cell: NASICON‐Type Material and Surface Modification

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 Na3V2(PO4)3 cathode modified by a uniform carbon layer (NVP/C) has been synthesized via a...

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Bibliographic Details
Published in:Chemistry, an Asian journal an Asian journal, 2020-05, Vol.15 (9), p.1430-1435
Main Authors: Zhang, Xianghua, Chen, Haoliang, Liu, Weiling, Xiao, Ni, Zhang, Qi, Rui, Xianhong, Huang, Shaoming
Format: Article
Language:English
Subjects:
aqueous zinc-ion batteries
Cathodes
Chemistry
Cycles
Electrochemical analysis
Energy storage
long cycling stability
Na3V2(PO4)3
Potential energy
pouch cells
Stability
Storage batteries
Zinc
Zn-storage mechanism
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Summary: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 Na3V2(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. A long‐cycling aqueous zinc‐ion pouch cell is reported by using the cathode material of the surface‐protected (a uniform carbon layer) NASICON‐type Na3V2(PO4)3 (NVP/C). Furthermore, the zinc storage mechanism has been systematically investigated. The NVP/C is fabricated by a facile solid‐state reaction, which is suitable for large‐scale applications.
ISSN:1861-4728
1861-471X
DOI:10.1002/asia.202000162