Journal
JOURNAL OF POWER SOURCES
Volume 451, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.227727
Keywords
Potassium-ion batteries; Amorphous; Boost rate; Superabsorbent polymers; Energy storage
Funding
- National Natural Science Foundation of China (NSFC) [21671133, 21271010]
- Shanghai Municipal Education Commission [15SG49]
- Technology Commission of Shanghai Municipality [18020500800, 18JC1412900]
- International Joint Laboratory on Resource Chemistry and Opening Project of Henan Province Key Laboratory of Water Pollution Control and Rehabilitation Technology
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Potassium-ion batteries (KIBs) are considered to be better alternative to lithium-ion batteries due to its high energy density, stability and safety. However, the problems of fast capacity declining at longtime recycling and poor storage capacity prevent its practical use. In this study, we report the development of 3-dimensional (3D) carbonaceous for KIBs anode that boost rate and cycle life performance. A simple method for designing an amorphous 3D carbon material of KIBs anode with superabsorbent polymers (SAPs) stripped from the baby diaper was fabricated with higher efficiency and environmentally friend. The 3D SAP porous carbon material can be obtained by simple carbonization and reactivation. Electrochemical measurements show that, a reversible potassium storage capacity of 270.4 mAh g(-1) at the current density of 50 mA g(-1) after 100 cycles, which is higher specific capacity than those of the reported undoped carbon nanomaterials. At the same time, at a current density of 1000 mA g(-1), the electrode material also showed extremely excellent cycle stability with discharge capacity of 161.7 mAh g(-1) after 2000 cycles.
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