Journal
FUNCTIONAL MATERIALS LETTERS
Volume 11, Issue 6, Pages -Publisher
WORLD SCIENTIFIC PUBL CO PTE LTD
DOI: 10.1142/S1793604718400118
Keywords
Carbon nanoflake; sodium-ion batteries; anode, seudocapacitive behavior
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Funding
- National Natural Science Foundation of China [51672182, 51772197, 51872192]
- Thousand Young Talents Plan
- Jiangsu Natural Science Foundation [BK20180002, BK20151219]
- Key University Science Research Project of Jiangsu Province [17KJA430013]
- 333 High-Level Talents Project in Jiangsu Province
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
- Russian Science Foundation [18-13-00217]
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The sharp increase in the cost of lithium resource has driven the research on sodium-ion batteries (SIBs) as sodium shares a similar electrochemical property as lithium. Carbonaceous materials are important anodes for rechargeable batteries, but the prevailing graphite only shows a limited activity towards sodium storage. Herein, we demonstrate that carbon nanoflakes serve as an efficient anode material for SIBs, exhibiting a stable capacity of 148 mAh g(-1) over 600 continuous cycles at 150 mA g(-1) and an excellent rate capability of 120 mAh g(-1) at 1500 mA g(-1). More importantly, sodium storage in carbon nanoflakes exhibits a pseudocapacitive behavior, possibly due to their larger interlayer spacing and less-ordered structure vs. crystallized carbon.
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