Tuning graphene surface chemistry to prepare graphene/polypyrrole supercapacitors with improved performance

Linfei Lai, Liang Wang, Huanping Yang, Nanda Gopal Sahoo, Qian Xin Tam, Jilei Liu, Chee Kok Poh, San Hua Lim, Zexiang Shen, Jianyi Lin