Journal
NATURE COMMUNICATIONS
Volume 11, Issue 1, Pages -Publisher
NATURE RESEARCH
DOI: 10.1038/s41467-020-18284-0
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Funding
- National Natural Science Foundation of China [21835004]
- National Programs for Nano-Key Project [2017YFA0206700]
- 111 Project from the Ministry of Education of China [B12015]
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Rechargeable aqueous batteries are an up-and-coming system for potential large-scale energy storage due to their high safety and low cost. However, the freeze of aqueous electrolyte limits the low-temperature operation of such batteries. Here, we report the breakage of original hydrogen-bond network in ZnCl2 solution by modulating electrolyte structure, and thus suppressing the freeze of water and depressing the solid-liquid transition temperature of the aqueous electrolyte from 0 to -114 degrees C. This ZnCl2-based low-temperature electrolyte renders polyaniline||Zn batteries available to operate in an ultra-wide temperature range from -90 to +60 degrees C, which covers the earth surface temperature in record. Such polyaniline parallel to Zn batteries are robust at -70 degrees C (84.9 mA h g(-1)) and stable during over 2000 cycles with similar to 100% capacity retention. This work significantly provides an effective strategy to propel low-temperature aqueous batteries via tuning the electrolyte structure and widens the application range of temperature adaptation of aqueous batteries.
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