Premium
Enhanced Solar‐Driven‐Heating and Tough Hydrogel Electrolyte by Photothermal Effect and Hofmeister Effect
Author(s) -
Wei Junjie,
Wei Gumi,
Wang Zhipeng,
Li Wenjun,
Wu Dongbei,
Wang Qigang
Publication year - 2020
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.202004091
Subject(s) - supercapacitor , electrolyte , materials science , photothermal therapy , energy storage , nanotechnology , solar energy , graphene , energy transformation , composite number , chemical engineering , electrochemistry , electrode , composite material , chemistry , electrical engineering , power (physics) , physics , engineering , quantum mechanics , thermodynamics
Although plenty of progress and achievements are made on hydrogel electrolyte researches, the inherent inferior low‐temperature performance of hydrogel electrolyte is still a severe challenge for wider application on the energy storage devices, due to the high content of water within hydrogel. Herein, an enhanced solar‐driven‐heating composite hydrogel electrolyte and a solar‐driven‐heating graphene based micro‐supercapacitor are developed utilizing the photothermal conversion ability and self‐initiation of MoS 2 nanosheets and additional Hofmeister effect. The MoS 2 composite hydrogel electrolyte not only improves the reliability of micro‐supercapacitor owing to its splendid mechanical properties, but also endows the micro‐supercapacitor with superior low‐temperature electrochemical performance and broadens its operating environment to a much lower temperature (−56 °C), which should be attributed to the excellent ability in converting endless solar energy into required thermal energy. These efforts would construct a new application platform for solar energy conversion and present an efficient method to structure severe‐cold resistant solid state energy storage devices for next‐generation.