**Author details**

Qian Xu1 \*, Chunzhen Yang2 and Huaneng Su1

1 Institute for Energy Research, Jiangsu University, Zhenjiang, China

2 School of Materials Science and Engineering, Sun Yat-Sen University, Guangzhou, China

\*Address all correspondence to: xuqian@ujs.edu.cn

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
