TY - JOUR
T1 - Stabilizing Interface pH by N-Modified Graphdiyne for Dendrite-Free and High-Rate Aqueous Zn-Ion Batteries
AU - YANG, Qi
AU - LI, Liang
AU - HUSSAIN, Tanveer
AU - WANG, Donghong
AU - HUI, Lan
AU - GUO, Ying
AU - LIANG, Guojin
AU - LI, Xinliang
AU - CHEN, Ze
AU - HUANG, Zhaodong
AU - LI, Yongjun
AU - XUE, Yurui
AU - ZUO, Zicheng
AU - QIU, Jieshan
AU - LI, Yuliang
AU - ZHI, Chunyi
N1 - This research was supported by GRF Scheme under Project CityU 11305218.
PY - 2022/2
Y1 - 2022/2
N2 -
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.
AB -
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.
UR - http://www.scopus.com/inward/record.url?scp=85121423365&partnerID=8YFLogxK
U2 - 10.1002/anie.202112304
DO - 10.1002/anie.202112304
M3 - Journal Article (refereed)
AN - SCOPUS:85121423365
SN - 1433-7851
VL - 61
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 6
M1 - e202112304
ER -