Electrochemical performance of microdisc-shaped carbon-coated lithium iron phosphate with preferentially exposed (010) planes in lithium sulfate aqueous solution

2015 ◽  
Vol 158 ◽  
pp. 342-347 ◽  
Author(s):  
Xuliang Fan ◽  
Jingjing Luo ◽  
Chen Shao ◽  
Xiaoshun Zhou ◽  
Zhenjiang Niu
Keyword(s):  
Aqueous Solution ◽  
Electrochemical Performance ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Lithium Sulfate ◽  
Carbon Coated

scholarly journals LiFePO4-Graphene Composites as High-Performance Cathodes for Lithium-Ion Batteries: The Impact of Size and Morphology of Graphene

Materials ◽  
2019 ◽  
Vol 12 (6) ◽  
pp. 842 ◽  
Author(s):  
Yanqing Fu ◽  
Qiliang Wei ◽  
Gaixia Zhang ◽  
Yu Zhong ◽  
Nima Moghimian ◽  
...  
Keyword(s):  
Electrochemical Performance ◽  
High Performance ◽  
Lithium Iron Phosphate ◽  
Low Cost ◽  
Lithium Ion ◽  
Iron Phosphate ◽  
Full Potential ◽  
Active Materials ◽  
Size And Morphology ◽  
The Impact

In this work, we investigated three types of graphene (i.e., home-made G, G V4, and G V20) with different size and morphology, as additives to a lithium iron phosphate (LFP) cathode for the lithium-ion battery. Both the LFP and the two types of graphene (G V4 and G V20) were sourced from industrial, large-volume manufacturers, enabling cathode production at low cost. The use of wrinkled and/or large pieces of a graphene matrix shows promising electrochemical performance when used as an additive to the LFP, which indicates that the features of large and curved graphene pieces enable construction of a more effective conducting network to realize the full potential of the active materials. Specifically, compared to pristine LFP, the LFP/G, LFP/G V20, and LFP/G V4 show up to a 9.2%, 6.9%, and 4.6% increase, respectively, in a capacity at 1 C. Furthermore, the LFP combined with graphene exhibits a better rate performance than tested with two different charge/discharge modes. Moreover, from the economic and electrochemical performance view point, we also demonstrated that 1% of graphene content is optimized no matter the capacity calculated, based on the LFP/graphene composite or pure LFP.

Carbon-Coated, Bismuth-Substituted, Lithium Iron Phosphate as Cathode Material for Lithium Secondary Batteries

2013 ◽  
Vol 739 ◽  
pp. 21-25 ◽  
Author(s):  
Xiang Yin Mo ◽  
Xiao San Feng ◽  
Yi Ding ◽  
Cai Rong Kang
Keyword(s):  
Discharge Capacity ◽  
Carbon Coating ◽  
Lithium Iron Phosphate ◽  
Rate Capability ◽  
Iron Phosphate ◽  
Solid State Reaction Method ◽  
High Rate ◽  
High Discharge Capacity ◽  
Lithium Secondary Batteries ◽  
Carbon Coated

Carbon-coated, bismuth-doped, lithium iron phosphates, LiFe1xBixPO4(0x0.05), have been synthesized by a solid-state reaction method. From the optimization, the carbon-coated LiFe0.95Bi0.05PO4phase showed superior performances in terms of phase purity and high discharge capacity. The structural, morphological, and electrochemical properties were studied and compared to carbon-coated, LiFePO4. The Li/LiFe0.95Bi0.05PO4with carbon coating cell delivered an initial discharge capacity of 145 mAh/g and was 30 mAh/g higher than the Li/LiFePO4with carbon coating cell. Cyclic voltammetry revealed excellent reversibility of the LiFe0.95Bi0.05PO4with carbon coating material. High rate capability studies were also performed and showed a capacity retention over 93% during the cycling. It was concluded that substituted Bi ion play an important role in enhancing battery performance of the LiFePO4material through improving the kinetics of the lithium insertion/extraction reaction on the electrode.

scholarly journals Non-stoichiometric carbon-coated LiFexPO4as cathode materials for high-performance Li-ion batteries

RSC Advances ◽  
2017 ◽  
Vol 7 (53) ◽  
pp. 33544-33551 ◽  
Author(s):  
Ying Feng ◽  
Junjie Gu ◽  
Feng Yu ◽  
Chunfu Lin ◽  
Jinli Zhang ◽  
...  
Keyword(s):  
Cathode Materials ◽  
High Performance ◽  
Lithium Iron Phosphate ◽  
Iron Phosphate ◽  
Lattice Parameters ◽  
Li Ion Batteries ◽  
Carbon Coated ◽  
Li Ion ◽  
Work First

This work first discloses the evolution of lattice parameters of the non-stoichiometric lithium iron phosphate crystals.

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