Please use this identifier to cite or link to this item: https://hdl.handle.net/1959.11/52104
Title: Stabilizing Interface pH by N‐Modified Graphdiyne for Dendrite‐Free and High‐Rate Aqueous Zn‐Ion Batteries
Contributor(s): Yang, Qi (author); Li, Liang (author); Hussain, Tanveer  (author)orcid ; Wang, Donghong (author); Hui, Lan (author); Guo, Ying (author); Liang, Guojin (author); Li, Xinliang (author); Chen, Ze (author); Huang, Zhaodong (author); Li, Yongjun (author); Xue, Yurui (author); Zuo, Zicheng (author); Qiu, Jieshan (author); Li, Yuliang (author); Zhi, Chunyi (author)
Publication Date: 2022-02-01
Early Online Version: 2021-11-19
DOI: 10.1002/ange.202112304
Handle Link: https://hdl.handle.net/1959.11/52104
Abstract: 

Zn dendrite issue was intensively studied via tuning zinc ion flux. pH change seriously influences dendrite formation, while its importance has not been revealed. Here, we construct a N-modification graphdiyne interface (NGI) to stabilize pH by mediating hydrated zinc ion desolvation. Operando pH detection reveals pH stabilization by NGI. This works with pores in NGI to achieve dendrite-free Zn deposition and an increased symmetric cell life span by 116 times. Experimental and theoretical result so we pH stabilization to desolvation with a reduced activation energy achieved by electron transfer from solvation sheath to N atom. The efficient desolvation ensures that electron directly transfers from substrate to Zn2+(rather than the coordinated H2O), avoiding O-H bond splitting. Hence, Zn-V6O13 battery achieves a long life span at 20.65 mA cm-2 and 1.07 mAh cm-2.This work reveals the significance of interface pH and provides a new approach to address Zn dendrite issue.

Publication Type: Journal Article
Source of Publication: Angewandte Chemie, 134(6), p. 1-9
Publisher: Wiley-VCH Verlag GmbH & Co KGaA
Place of Publication: Germany
ISSN: 1521-3757
0044-8249
Fields of Research (FoR) 2020: 400404 Electrochemical energy storage and conversion
400403 Chemical engineering design
400499 Chemical engineering not elsewhere classified
Socio-Economic Objective (SEO) 2020: 170301 Battery storage
170803 Hydro-electric energy
170899 Renewable energy not elsewhere classified
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article
School of Science and Technology

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