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High‐Performance Lithium‐ion Supercapatteries Constructed Using Li 3 V 2 (PO 4 ) 3 /C Mesoporous Nanosheets
Author(s) -
Zhuang Biying,
Wu Zhaojun,
Chu Wenjing,
Gao Yanfang,
Cao Zhenzhu,
Bold Tungalagtamir,
Yang Nianjun
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201902966
Subject(s) - lithium (medication) , cathode , materials science , mesoporous material , power density , electrolyte , anode , lithium vanadium phosphate battery , vanadium , carbon fibers , ion , analytical chemistry (journal) , chemical engineering , composite number , chemistry , electrode , composite material , catalysis , chromatography , metallurgy , quantum mechanics , medicine , biochemistry , power (physics) , physics , organic chemistry , engineering , endocrinology
To construct “non‐consumable electrolyte type” or “internal serial hybrid type” lithium‐ion supercapatteries with both high power and energy densities, carbon‐coated lithium vanadium phosphate composite (Li 3 V 2 (PO 4 ) 3 /C) is utilized as the cathode. This cathode with a high specific area is synthesized by a hydrothermal method assisted by delayed sol‐gel method and using the surfactant of myristyltrimethylammonium bromide as the carbon source. It is self‐assembled and mesoporous. This cathode has a high specific surface area of 40.92 m 2 g −1 , a pore volume of 0.095 cm 3 g −1 , a considerably high initial discharge capacity of 166 mAh g −1 at 0.2 C‐rate. Even at 20 C‐rate, the high discharge capacity of 90 mAh g −1 is maintained. The lithium‐ion supercapattery assembled using this cathode, the anode of activated carbon as exhibits a discharge time of as long as 1369.24 s, a maximum energy density of 53.22 Wh kg −1 , and a maximum power density of 3.01 kW kg −1 . Such lithium‐ion supercapatteries thus overcome the disadvantages of rapid energy density attenuation under high power density of existed lithium‐ion supercapatteries.