期刊
ACS NANO
卷 15, 期 10, 页码 16616-16624出版社
AMER CHEMICAL SOC
DOI: 10.1021/acsnano.1c06372
关键词
zinc-ion batteries; MoS2/ZnO photocathodes; stacked design; photo-rechargeable batteries; photoconversion efficiency
类别
资金
- Newton International Fellowship-The Royal Society (UK) [NIF\R1\181656]
- ERC Consolidator grant MIGHTY [866005]
- EPSRC Graphene CDT [EP/L016087/1]
- European Research Council (ERC) [866005] Funding Source: European Research Council (ERC)
The translation describes a photo-rechargeable zinc-ion battery that utilizes solar energy for harvesting and storing, reducing the need for solar cells or power converters while increasing battery capacity. This battery demonstrates high photo and solar conversion efficiencies, as well as a high capacity retention over cycling.
Systems for harvesting and storing solar energy have found practical applications ranging from solar farms to autonomous smart devices. Generally, these energy solutions consist of solar cells for light harvesting and rechargeable batteries to match the solar energy supply to consumption demands. Rather than having a separate energy harvesting and storing device, we report photo-rechargeable zinc-ion batteries (h nu-ZIBs) using a photoactive cathode composed of layer-by-layer grown zinc oxide and molybdenum disulfide. These photocathodes are capable of harvesting solar energy and storing it in the same material and alleviate the need for solar cells or power converters. The proposed photocathodes achieve photoconversion efficiencies of similar to 1.8% using a 455 nm light source and similar to 0.2% of solar-conversion efficiencies. Light not only allows photocharging but also enhances the battery capacity from 245 to 340 mA h g(-1) (specific current of 100 mA g(-1) and 12 mW cm(-2) light intensity at 455 nm). Finally, the proposed h nu-ZIBs also demonstrate a capacity retention of -82% over 200 cycles.
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