清洁能源的开发和高效利用已成为推动当代社会可持续发展的核心技术之一.在这一背景下,光充电锂离子电池（Photo-Rechargeable Lithium-Ion Batteries, PR-LIB）因其能够同时解决太阳能间歇性问题和实现电池自充电的特性,受到了广泛关注.本研究设计并制备了一种基于无铅铋基杂化钙钛矿(（CH3NH3）3Bi2I9)的光活性电极,该电极不仅具备高效的光电转换能力,还能够将太阳能以化学能的形式储存于电池内部,从而实现光能与电能的双重利用.实验结果表明,在光照条件下,基于该电极的PR-LIB放电容量从黑暗中的236 mAh g-1显著提升至282.4 mAh g-1(电流密度为50 mA g-1).容量增长率达到19.7%.这一性能提升主要归因于铋基杂化钙钛矿材料在光照下产生的光生载流子,这些载流子有效促进了电极内部的电荷转移过程,并加速了锂离子的扩散动力学,从而显著降低了电荷转移电阻并提高了电池的整体效率.此外,在光照条件下,电池的充电电位降低了0.1 V （对应输入功率减少6%）,而放电电压则升高了0.1 V （对应输出功率增加11.8%）.本研究不仅揭示了铋基杂化钙钛矿在光充电电池中的独特优势,还为下一代高效、节能、环境友好的储能系统提供了新的设计思路,尤其是在便携式电子设备领域展现了广阔的应用前景.
The development and utilization of clean energy have emerged as indispensable technologies within contemporary societal structures,and the development of photo-rechargeable lithium-ion batteries(PR-LIB)holds new promi...
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The development and utilization of clean energy have emerged as indispensable technologies within contemporary societal structures,and the development of photo-rechargeable lithium-ion batteries(PR-LIB)holds new promise for simultaneously eliminating solar energy volatility limitations and realizing battery *** this study,we present photoactive electrodes consisting of lead-free bismuth-based hybrid perovskite that combine the dual functions of photovoltaic conversion and energy *** was found that the PR-LIB based on this electrode increased the discharge capacity of the battery from 236.0 mA h g^(-1) in the dark to 282.4 mA h g^(-1)(a current density of 50 mA g^(-1))with a growth rate of 19.7%under light *** photogenerated carriers generated by the methylammonium bismuth iodide(MBI)effectively accelerated the charge transfer and lithium-ion diffusion,which contributed to the increase of the capacity and the decrease of the charge-transfer ***,the charging potential decreased by 0.1 V(6%reduction in input power)while the discharging potential increased by 0.1 V(11.8%increase in output power)under *** work demonstrates the potential of PR-LIB as an efficient,energy-saving battery in portable electronic devices.
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