title: C-LFP-multi-walled carbon nanotubes composite cathode materials synthesized by solid-state reaction for lithium ion batteries.
abstract: Multi-walled carbon nanotubes (MWNT) was utilized as a conductive additive to enhance the capacity and rate capability of carbon coated LiFePO4 (C-LFP). Composites of C-LFP with MWNT (C-LFP-MWNT) were prepared by blending MWNT at different stages of C-LFP synthesis. The pre-blending (PrB) of MWNT (5, 10, 15 wt%) with LFP precursor (PrB-C-LFP-MWNT) before calcination in a reducing environment (5 vol% H2 in N2) at 750 degrees C, produced phase pure crystalline LFP with a reduction in particle size as increase in MWNT content. This was contrasted with post-blending (PoB) of MWNT with as-synthesized C-LFP (PoB-C-LFP-MWNT), which gave inferior electrochemical performances. The PrB-C-LFP-MWNT (10 wt%) composite showed better cycle stability, higher rate capability, and faster Li diffusion characteristics than PoB-C-LFP-MWNT.
authors.affiliation: Department of Printed Electronics and Engineering in World Class University (WCU) Program, Sunchon National University, Sunchon, Chonnam 540-742, Republic of Korea.
authors.forename: Yun-Hwa
authors.initials: YH
authors.lastname: Hwang
authors.forename: S J Richard
authors.initials: SJ
authors.lastname: Prabakar
authors.forename: Myoungho
authors.initials: M
authors.lastname: Pyo