Assessing The Maximum Power And Consistency Of Carbon Supercapacitors Through A Facile Practical Strategy
ACS SUSTAINABLE CHEMISTRY & ENGINEERING(2020)
摘要
The maximum power and consistency assessment are key technologies for the practical application of energy storage device packs such as carbon supercapacitors (SCs) connected in series. Herein, we first report a simple practical strategy to efficiently evaluate SCs' maximum power and consistency by using the dependence of direct-current equivalent series resistance (ESR dc ) on current density from small to large and demonstrate its general applicability to SCs using neutral, acidic, and alkaline aqueous electrolytes. With this strategy implemented by a computer program, a group of highly consistent SCs with safe power can be obtained, especially for high-rate consistency associated with ionic resistance under high-power operation. The ESRdc evolution is attributed to the dynamic migration resistance of ions migrating from micro- to meso-/macropores, which contains the real ion migration/storage characteristic information. This study provides real practical application possibilities for solving the problems of SC consistency assessment and rated power setting in batch.
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关键词
carbon supercapacitors,direct current equivalent series resistance evolution,consistency evaluation,maximum power,practical strategy
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