Stabilizing Interface pH by N-Modified Graphdiyne for Dendrite-Free and High-Rate Aqueous Zn-Ion Batteries
Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
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Detail(s)
| Original language | English |
|---|---|
| Article number | e202112304 |
| Journal / Publication | Angewandte Chemie - International Edition |
| Volume | 61 |
| Issue number | 6 |
| Online published | 19 Nov 2021 |
| Publication status | Published - 1 Feb 2022 |
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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 lifespan by 116 times. Experimental and theoretical results owe 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 lifespan 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.
Research Area(s)
- desolvation, graphdiyne, interface pH, Zn batteries, Zn dendrite
Citation Format(s)
Stabilizing Interface pH by N-Modified Graphdiyne for Dendrite-Free and High-Rate Aqueous Zn-Ion Batteries. / Yang, Qi; Li, Liang; Hussain, Tanveer et al.
In: Angewandte Chemie - International Edition, Vol. 61, No. 6, e202112304, 01.02.2022.Research output: Journal Publications and Reviews (RGC: 21, 22, 62) › 21_Publication in refereed journal › peer-review
