期刊
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
卷 165, 期 13, 页码 A3100-A3107出版社
ELECTROCHEMICAL SOC INC
DOI: 10.1149/2.0681813jes
关键词
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资金
- National Natural Science Foundation of China [51702131, 51774151, 51774150]
- Natural Science Foundation of Jiangsu Provence, China [SBK2017041705]
- Institute of Green Materials and Metallurgy [5501670001]
Al-based anode can potentially reduce the dual-ion energy storage device's quality and volume, however, the cycling performance is always insufficient. Herein, we fabricated Al-CNSs hybrid supercapacitors (SCs) using carbon nanosponge materials (CNSs) as cathode materials and graphite-protected etched Al foils as the anodes. The macro-/mesoporous structure in CNSs facilitates the ions (solvated PF6-) transport, resulting in much better SC rate capability compared to the commercial activated carbon. The etched pores in Al foil offer numerous alloying reaction sites to accommodate the volume expansion. In addition, the graphite layer on the Al surface blocks the Li dendrite growth, leading to homogeneous alloying-dealloying reaction. Such Al-CNSs hybrid SC delivered a high maximum specific capacitance of 181 F g(-1) at 0.05 A g(-1), remained 62 F g(-1) at 1 A g(-1), and offered a retention value of 83% after 1000 cycles, which was largely improved compared to the pure Al and etched Al without coating. The whole device can offer 75 Wh L-1 due to the thin anode design, which is comparable to the lead acid batteries. (C) 2018 The Electrochemical Society.
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