Journal
NANO ENERGY
Volume 98, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.nanoen.2022.107248
Keywords
Polymer electrolyte; All-solid-state lithium-oxygen battery; Black TiO2; Photo-electro-thermal
Categories
Funding
- National Natural Science Foundation of China [22075063, U1932205, 51773049]
- Fundamental Research Funds for the Central Universities [HIT.OCEF.2021028]
- Natural Science Funds of Heilongjiang Province [ZD2019B001]
- Heilongjiang Touyan Team [HITTY-20190033]
- Harbin Institute of Technology (HIT)
- Cultivation Plan of Major Scientific Research Projects of HIT [XNXWQQ5740001619]
- ChinesischDeutsches Mobilitatsprogram [M-0281]
- Chongqing Research Institute of HIT
- China Aerospace Science and Technology
- Corporation-Harbin Institute of Technology Joint Center for Technology Innovation Fund [HIT15-1A01]
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A multifunctional composed cathode with photo-electro-thermal synergy is proposed to develop solid-state Li-O-2 batteries operating at room temperature. By converting solar energy into heat, the composed cathode achieves self-heating and enhances the stability and reliability of the battery.
The limited stability and the excessive dependence on external heating sources restrict the development of polymer-based solid-state Li-O-2 batteries. Herein, we propose a multifunctional composed cathode with the photo-electro-thermal synergy to achieve a PEO-based solid-state Li-O-2 (PSS Li-O-2) battery operating at room temperature. The multifunctional composed cathode consists of the traditional black TiO2 photocatalyst and carbon cloth (b-TiO2/CC). The b-TiO2/CC harvests a full spectrum of sunlight, besides the photo-generated electrons and holes enhancing reaction kinetics during discharging and charging processes, though converting solar energy into heat to achieve self-heated replace on external. The photo-electro-thermal synergy-triggered PSS Li-O-2 battery establishes a low overpotential of 0.26 V and long durability of up to 90 cycles, which is a breakthrough for PEO-based Li-O-2 batteries operating at room temperature. A flexible PSS Li-O-2 battery is constructed and exhibits superior flexibility and mechanical stability. The mechanism of the photo-electro-thermal synergy provides a new strategy for PSS Li-O-2 batteries and advances the high-efficiency utilization of solar energy in portable devices.
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