Anodic WO3 Mesosponge @ Carbon: A Novel Binder-less Electrode for Advanced Energy Storage Devices

作者：Pervez Syed Atif; Kim Doohun^*; Doh Chil Hoon; Farooq Umer; Choi Hae Young; Choi Jung Hee

来源：ACS Applied Materials & Interfaces, 2015, 7(14): 7635-7643.

DOI：10.1021/acsami.5b00341

• mesosponge
• WO3
• carbon-coating anodization
• battery

A novel design for an anodic WO3 mesosponge @ carbon has been introduced as a highly stable and long cyclic life Li-ion battery electrode. The nanocomposite was successfully synthesized via single-step electrochemical anodization and subsequent heat treatment in an acetylene and argon gas environment. Morphological and compositional characterization of the resultant materials revealed that the composite consisted of a three-dimensional interconnected network of WO3 mesosponge layers conformally coated with a 5 nm thick carbon layer and grown directly on top of tungsten metal. The results demonstrated that the carbon-coated mesosponge WO3 layers exhibit a capacity retention of 87% after completion of 100 charge/discharge cycles, which is significantly higher than the values of 25% for the crystalline (without carbon coating) or 40% for the as-prepared mesosponge WO3 layers. The improved electrochemical response was attributed to the higher stability and enhanced electrical conductivity offered by the carbon coating layer.

• 出版日期2015-4-15