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MOF-derived Bi 2 O 3 @C microrods as negative electrodes for advanced asymmetric supercapacitors.

Xianbo YuJie SunWenna ZhaoShihang ZhaoHongmei ChenKai TaoYaoping HuLei Han
Published in: RSC advances (2020)
Bismuth oxide (Bi 2 O 3 ) 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 Bi 2 O 3 microrods with a carbon coat (Bi 2 O 3 @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 Bi 2 O 3 @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.
Keyphrases
  • metal organic framework
  • solid state
  • reduced graphene oxide
  • carbon nanotubes
  • high intensity