期刊
ADVANCED ENERGY MATERIALS
卷 7, 期 20, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/aenm.201700920
关键词
dual-carbon batteries; graphite cathode; MCMB anode; potassium-ion electrolyte; dual ion batteries
类别
资金
- National Natural Science Foundation of China [51302238, 51602337, 51402344, 51402343]
- Science and Technology Planning Project of Guangdong Province [2014A010105032, 2014A010106016, 2015A010106008]
- Guangdong Innovative and Entrepreneurial Research Team Program [2013C090]
- Natural Science Foundation of Guangdong Province [2014A030310226, 2014A030310482]
- Shenzhen Science and Technology Planning Project [JCYJ20140417113430618, JSGG20150602143328010, JSKF20150925163525547, JSGG20160301173 854530, JSGG20160301155933051, JSGG20160229202951528, JCYJ20150 401145529042, JCYJ20150630114942259, JCYJ20140417113430647]
- Shenzhen Engineering Laboratory Foundation [20151837]
- Scientific Equipment Project of Chinese Academy of Sciences [yz201440]
Although potassium-ion batteries (KIBs) have been considered to be promising alternatives to conventional lithium-ion batteries due to large abundance and low cost of potassium resources, their development still stays at the infancy stage due to the lack of appropriate cathode and anode materials with reversible potassium insertion/extraction as well as good rate and cycling performance. Herein, a novel dual-carbon battery based on a potassium-ion electrolyte (named as K-DCB), utilizing expanded graphite as cathode material and mesocarbon microbead as anode material is developed. The working mechanism of the K-DCB is investigated, which is further demonstrated to deliver a high reversible capacity of 61 mA h g(-1) at a current density of 1C over a voltage window of 3.0-5.2 V, as well as good cycling performance with negligible capacity decay after 100 cycles. Moreover, the high working voltage with medium discharge voltage of 4.5 V also enables the K-DCB to meet the requirement of some high-voltage devices. With the merits of environmental friendliness, low cost and high energy density, the K-DCB shows attractive potential for future energy storage application.
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