Fan Ling, Liu Qian, Chen Suhua, Lin Kairui, Xu Zhi, Lu Bingan
School of Physics and Electronics, State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body, Hunan University, Changsha, 410082, P. R. China.
Quanzhou Number Fifth High School ChengDong, Quanzhou, 362000, P. R. China.
Small. 2017 Aug;13(30). doi: 10.1002/smll.201701011. Epub 2017 Jun 8.
A potassium ion battery has potential applications for large scale electric energy storage systems due to the abundance and low cost of potassium resources. Dual graphite batteries, with graphite as both anode and cathode, eliminate the use of transition metal compounds and greatly lower the overall cost. Herein, combining the merits of the potassium ion battery and dual graphite battery, a potassium-based dual ion battery with dual-graphite electrode is developed. It delivers a reversible capacity of 62 mA h g and medium discharge voltage of ≈3.96 V. The intercalation/deintercalation mechanism of K and PF into/from graphite is proposed and discussed in detail, with various characterizations to support.
由于钾资源丰富且成本低廉，钾离子电池在大规模电能存储系统中具有潜在应用价值。双石墨电池以石墨作为阳极和阴极，避免了过渡金属化合物的使用，大大降低了总体成本。在此，结合钾离子电池和双石墨电池的优点，开发了一种具有双石墨电极的钾基双离子电池。它具有62 mA h g的可逆容量和约3.96 V的中等放电电压。本文详细提出并讨论了钾离子和PF在石墨中的嵌入/脱嵌机制，并辅以各种表征进行支持。
