Ultrafast rechargeable Zn micro-batteries endowing a wearable solar charging system with high overall efficiency,Energy & Environmental Science

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Ultrafast rechargeable Zn micro-batteries endowing a wearable solar charging system with high overall efficiency
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2021-2-2 , DOI: 10.1039/d0ee03623d
Zhengnan Tian _{1,

2,

3,

4,

5} , Zhongti Sun _{1,

2,

3,

4,

5} , Yanyan Shao _{1,

2,

3,

4,

5} , Liang Gao _{1,

2,

3,

4,

5} , Rong Huang _{1,

2,

3,

4,

5} , Yuanlong Shao _{1,

2,

3,

4,

5} , Richard B. Kaner _{6,

7,

8,

9,

10} , Jingyu Sun _{1,

2,

3,

4,

5}

Affiliation

Wearable solar charging systems are now developing rapidly. However, their insufficient overall efficiency and poor charging rate remain daunting challenges. Herein, we report the rational design of a wearable solar charging unit based on a miniature GaAs solar cell and an ultrafast rechargeable Zn micro-battery. This integrated system demonstrates a high overall efficiency of 23.11%. Upon solar charging for 5 s, the system delivers a continuous supply of power for 110 s at 0.5 mA cm⁻², showing favorable fast charging performance characteristics. With the aid of in-depth characterization combined with theoretical simulations, the electrochemical energy storage mechanism of the zinc ion battery is elucidated as the synergy of hydroxyl anion intercalation with surface pseudocapacitive reaction. This work provides an innovative strategy to construct wearable solar charging units with high efficiency and advanced charging capabilities.

中文翻译：

超快速可充电锌微电池，赋予可穿戴式太阳能充电系统高整体效率

可穿戴式太阳能充电系统现在正在迅速发展。但是，它们的整体效率不足和充电率低仍然是艰巨的挑战。本文中，我们报告了基于微型GaAs太阳能电池和超快充电锌微电池的可穿戴式太阳能充电装置的合理设计。该集成系统显示出23.11％的高总体效率。太阳能充电5 s后，系统以0.5 mA cm ^-2的速度连续供电110 s，表现出良好的快速充电性能特征。借助于深入表征和理论模拟，阐明了锌离子电池的电化学储能机理，即羟基阴离子嵌入与表面假电容反应的协同作用。这项工作为构建具有高效率和先进充电能力的可穿戴式太阳能充电装置提供了创新的策略。

更新日期：2021-02-17

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