Journal
ADVANCED SCIENCE
Volume 6, Issue 15, Pages -Publisher
WILEY
DOI: 10.1002/advs.201900620
Keywords
carbon electrodes; lithium-sulfur batteries; perovskite solar cells; solar rechargeable batteries
Categories
Funding
- 973 Program [2015CB251100]
- National Natural Science Foundation [21875123]
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Solar cells and rechargeable batteries are two key technologies for energy conversion and storage in modern society. Here, an integrated solar-driven rechargeable lithium-sulfur battery system using a joint carbon electrode in one structure unit is proposed. Specifically, three perovskite solar cells are assembled serially in a single substrate to photocharge a high energy lithium-sulfur (Li-S) battery, accompanied by direct conversion of the solar energy to chemical energy. In the subsequent discharge process, the chemical energy stored in the Li-S battery is further converted to electrical energy. Therefore, the newly designed battery is capable of achieving solar-tochemical energy conversion under solar-driven conditions, and subsequently delivering electrical energy from the stored chemical energy. With an optimized structure design, a high overall energy conversion efficiency of 5.14% is realized for the integrated battery. Moreover, owing to the self-adjusting photocharge advantage, the battery system can retain high specific capacity up to 762.4 mAh g(-1) under a high photocharge rate within 30 min, showing an effective photocharging feature.
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