Journal
RSC ADVANCES
Volume 10, Issue 24, Pages 14107-14112Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d0ra01470b
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Funding
- National Natural Science Foundation of China [21471086, 21971131]
- Natural Science Foundation of Zhejiang Province [LY20E020005]
- K. C. Wong Magna Fund from Ningbo University
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Bismuth oxide (Bi2O3) with high specific capacity has emerged as a promising negative electrode material for supercapacitors (SCs). Herein, we propose a facile metal-organic framework (MOF) derived strategy to prepare Bi2O3 microrods with a carbon coat (Bi2O3@C). They exhibit ultrahigh specific capacity (1378 C g(-1) at 0.5 A g(-1)) and excellent cycling stability (93% retention at 4000 cycles) when acting as negative electrode material for advanced asymmetric SCs. The assembled Bi2O3@C//CoNi-LDH asymmetric supercapacitor device exhibits a high energy density of 49 W h kg(-1) at a power density of 807 W kg(-1). The current Bi-MOF-derived strategy would provide valuable insights to prepare Bi-based inorganic nanomaterials for high-performance energy storage technologies and beyond.
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