Photothermal Supercapacitors with Gel Polymer Electrolytes for Wide Temperature Range Operation
Photothermal Supercapacitors with Gel Polymer Electrolytes for Wide Temperature Range Operation
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DOI：
10.1021/acsenergylett.3c00207
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发表时间：
2023-03-24
影响因子：
22
通讯作者：
Ng, Tse Nga
中科院分区：
文献类型：
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作者：
Shin, Chanho;Yao, Lulu;Ng, Tse Nga
为了在广泛的温度范围内提供电化学能量，本工作研究了一种新型凝胶聚合物电解质(GPE)，用于运行在-60至65℃的光热超级电容器。GPE由聚丙烯腈和活性填料聚苯乙烯磺酸钠混合而成，可同时提高离子导电性和捕获金属阳离子杂质。活性填料降低了超级电容器的自放电率和杂质扩散系数，使热环境下的能量损失最小。对于冷设置，器件封装了光热转换层，在-60摄氏度的室内，在0.4 mW/cm2的输出功率密度下，光热转换层提高了电池内部温度，并将能量密度提高到94微瓦时/厘米2。我们改进的GPE和光热转换相结合，增加了存储的能量，从而延长了由超级电容器从冷启动驱动的电机的运行时间，展示了适用于恶劣环境的高性能设计。
To deliver electrochemical energy over a wide range of temperatures, this work studies a new gel polymer electrolyte (GPE) for photothermal supercapacitors operating from -60 to 65 degrees C. The GPE consists of polyacrylonitrile mixed with an active filler sodium polystyrenesulfonate that simultaneously improves ionic conductivity and traps metal cation impurities. The self-discharge rate and impurity diffusion coefficients in the supercapacitors were lowered by the active filler to minimize energy loss in hot environments. For cold settings, the devices were packaged with a photothermal conversion layer that increased the internal cell temperature and raised the energy density to 94 mu Wh/cm2 at the output power density of 0.4 mW/cm2 in a -60 degrees C chamber. The combination of our improved GPE and photothermal conversion increased the stored energy and thereby extended the operational time of a motor driven from a cold start by a supercapacitor, demonstrating a high-performance design suitable for harsh environments.