Abstract
Two impending problems of practical rechargeable aqueous zinc metal batteries (RZMBs) are the underutilization of high-loading materials at the cathode side and zinc dendrite at the anode side. Herein, based on hydrophobic association, we report the amphiphilic hydrogel electrolytes featured by unique hydrophobic association and target permeation properties, which enables full utilization of dense thick cathode materials with loading masses approaching a practical level. Meanwhile, the ion tunnels within the amphiphilic hydrogel electrolytes can regulate Zn2+ migration and homogenize interfacial deposition at different current densities, rendering a smooth and compact Zn morphology in a dendrite- and passivation-free manner. Meriting these advantages of the amphiphilic hydrogel electrolytes, the assembled Zn||MnO2 batteries delivered a high areal capacity of >2.0 mAh cm−2 for 200 cycles at a large MnO2 loading mass up to 16.8 mg cm−2. Further, large-sized (up to 200 cm−2) Zn||MnO2 pouch batteries were demonstrated. This work opens a new avenue toward realizing viable RZMBs with practical large areal capacities and sizes.
Original language | English |
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Article number | 102858 |
Journal | Energy Storage Materials |
Volume | 60 |
Early online date | 16 Jun 2023 |
DOIs | |
Publication status | Published - Jun 2023 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2023 Elsevier B.V.
Funding
This research was supported by financial support from the Australian Research Council Discovery Early Career Researcher Award ( DE200101669 ). This work was supported in part by InnoHK Project on [Project 1.3 - Flexible and Stretchable Technologies (FAST) for monitoring of CVD risk factors: Sensing and Applications] at Hong Kong centre for Cerebro-cardiovascular Health Engineering (COCHE) and CRF by RGC under C1002–21 G.
Keywords
- Amphiphilic polymer chains
- High-areal-capacity
- Hydrogels with targeted adhesion
- Zinc batteries