title: Remarkable cycle-activated capacity increasing in onion-like carbon nanospheres as lithium battery anode material.
abstract: Onion-like carbon nanospheres (OCNSs) with an average diameter of 43 nm were produced on a large scale via a combustion method and examined as an anode material for lithium ion batteries. The OCNSs exhibit a remarkable electrochemical cycling behavior and a capacity much higher than that of graphite. The capacity increases significantly with increasing charge-discharge cycles and reaches a value of 178% of the initial value (from 586 mA h g-1to 1045 mA h g-1) after 200 cycles. Further investigation provides unambiguous experimental evidence that such a remarkable capacity increase is related to the stable onion-like structure of the OCNSs and to the existence of large numbers of disordered/short graphitic fragments, which gradually provide more active sites for Li ion storage. The unique electrochemical performance of OCNSs provides a new way to design a high-performance anode material for rechargeable batteries.
authors.affiliation: State Key Laboratory of Superhard Materials, Jilin University, No. 2699 Qianjin Street, Changchun 130012, People's Republic of China.
authors.forename: Jiajun
authors.initials: J
authors.lastname: Dong
authors.forename: Tong
authors.initials: T
authors.lastname: Zhang
authors.forename: Dong
authors.initials: D
authors.lastname: Zhang
authors.forename: Weiwei
authors.initials: W
authors.lastname: Zhang
authors.forename: Huafang
authors.initials: H
authors.lastname: Zhang
authors.forename: Ran
authors.initials: R
authors.lastname: Liu
authors.forename: Mingguang
authors.initials: M
authors.lastname: Yao
authors.forename: Bingbing
authors.initials: B
authors.lastname: Liu