Net-Like ZnO/Carbon–Aerogel Composite as Anode Material for Ni-Zn Secondary Battery

Abstract:

Nanosized ZnO particles were prepared by a facile homogeneous precipitation method. Resorcinol-formaldehyde sol with addition of the ZnO particles was carbonized at 700 °C for 1.5 h to prepare ZnO/carbon-aerogel composite. TEM investigation shows that ZnO particles were em-bedded in 3-dimensional net-like carbon and covered uniformly by amorphous carbon coating. Compared with ZnO, the ZnO/carbon-aerogel composite showed better cycling stability, higher discharge capacity and lower charge-transfer resistance. The discharge capacity delivered by the ZnO/carbon-aerogel composite remained above 550 mAh g^-1 during 40 cycles with little capacity loss. The enhanced electrochemical performances were mainly ascribed to the effects of the net-like structure of amorphous carbon, which uniformly surrounded the ZnO particles to guarantee good contact and acted as a skeleton to alleviate the shape change and dendrite growth of zinc electrode.

• Periodical: Advanced Materials Research (Volumes 335-336)
• Pages: 1358-1363
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.335-336.1358
• Online since: September 2011
• Authors: Hui Huang, Sai Jun Gu, Yong Ping Gan, Wen Kui Zhang
• Keywords: Carbon Aerogel, Composite, Nanosized Zno, Ni/Zn Secondary Batteries

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