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Synthesis of Core–Shell Structured LiFe 0.5 Mn 0.3 Co 0.2 PO 4 @C with Remarkable Electrochemical Performance as the Cathode of a Lithium‐Ion Battery
Author(s) -
Zhong Yanjun,
Wu Zhenguo,
Li Juntao,
Xiang Wei,
Guo Xiaodong,
Zhong BenHe,
Sun Shigang
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201402414
Subject(s) - materials science , electrochemistry , carbon fibers , scanning electron microscope , electrolyte , transmission electron microscopy , chemical engineering , lithium (medication) , ternary operation , cathode , analytical chemistry (journal) , electrode , composite number , nanotechnology , composite material , chemistry , programming language , medicine , chromatography , endocrinology , computer science , engineering
A carbon‐coated ternary olivine solid solution LiFe 0.5 Mn 0.3 Co 0.2 PO 4 composite was synthesized by using a facile rheological phase reaction with stearic acid as the carbon source. Scanning electron microscopy (SEM) and transmission electron microscopy (TEM) characterization indicated that the core–shell structured LiFe 0.5 Mn 0.3 Co 0.2 PO 4 @C nanoplatelets are about 50 to 120 nm in size and have a quite uniform and complete carbon coating layer (4 nm thick). This uniform carbon layer not only improves the electronic conductivity of the materials, but also preserves the active material from corrosion by the electrolyte. The material was used as the electrode of a lithium‐ion battery and exhibited outstanding electrochemical performance, including good capacity and stable cycling behavior. It delivers a reversible discharge capacity of 146.7 mA h g −1 at 0.1 C. In addition, a discharge capacity of 110.5 mA h g −1 at 1 C was still maintained after 100 cycles with capacity retention of 90.6 %.