Journal
ENERGY STORAGE MATERIALS
Volume 48, Issue -, Pages 244-262Publisher
ELSEVIER
DOI: 10.1016/j.ensm.2022.03.013
Keywords
Biopolymer; Hydrogel; Electrolyte; Supercapacitor; Battery
Funding
- National Natural Science Foundation of China [32071720]
- China Postdoctoral Science Foundation [2021M702456]
- Tianjin Research Inno-vation Project for Postgraduate Students [2021YJSB198]
- China Scholarship Council [202108120056, 201708120052]
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Using biopolymer-based hydrogel electrolytes as alternatives to traditional petroleum-based materials in energy storage and conversion devices has great potential, with advantages such as low cost, eco-friendliness, and degradability. Current research focuses on the development of electrochemical performance and additional functions, while facing challenges that require further study and development.
With steadily growing environmental problems by synthetic compounds, using eco-friendly biomass-derived biopolymers and other native materials has drawn tremendous attention and extensive interest, to replace traditional petroleum-based materials. Biopolymer-based hydrogels, as emerging and renewable electrolyte materials, have been considered to be competitive candidates for flexible and smart electrochemical energy storage and conversion devices due to the low cost, eco-friendly and degradability. Recently, biopolymer-based hydrogel electrolytes with desirable structure design or functional development have exhibited broad application prospects in diverse energy storage and conversion devices, such as multifunctional supercapacitors, flexible lithium-ion batteries and zinc-ion batteries. Herein, the characterization, synthesis, and performance validation of biopolymerbased hydrogel electrolytes are summarized, analyzed, and discussed. Current progress of electrochemical performance and additional functions (such as self-healing, stretchability, anti-freezing, and etc.) in developing biopolymer-based hydrogel electrolytes for supercapacitors and batteries are comprehensively reviewed. We also present the remaining challenges of using biopolymer-based hydrogel electrolytes for advanced energy storage and conversion devices and propose the underlying approaches to facilitate further development and research.
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