Details

Autor(en) / Beteiligte

• Li, Yuanchao
• Hao, Jinghao
• Geng, Guangwei
• Wang, Yafang
• Shang, Xiaokun
• Yang, Changchun
• Li, Baojun

Titel

Large-scale preparation of Mg doped LiFePO sub(4)[at]C for lithium ion batteries via carbon thermal reduction combined with aqueous rheological phase technology

Ist Teil von

• RSC advances, 2015-08, Vol.5 (84), p.68681-68687

Erscheinungsjahr

2015

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• A LiFePO sub(4) precursor was prepared using an aqueous mixing process combined with rheological phase technology. Due to homogeneous mixing of the starting materials, a uniform distribution of doped atoms and coated carbon in the as-prepared LiFePO sub(4) material was obtained. There existed a Fe super(3+) valence state of iron in the as-prepared sample. The uniform distribution of elements and small particles, and the surface phase of Fe super(3+) generated through controlled off-stoichiometry, improved the electronic conductivity. The as-prepared LiFePO sub(4) sample delivered a discharge capacity of 166 mA h g super(-1) at 0.1C and presented an excellent rate capacity of 148 mA h g super(-1) and a high potential plateau of 3.32 V at 1C. Approximately 100% capacity retention was maintained after 150 cycles at 1C or 200 cycles at 10C. This aqueous ball-milling process is a promising route for scaled-up production of LiFePO sub(4) materials with high quality at a reasonable cost.