Effects of Different Carbon Sources on Performance of LiFePO4/C Composite Material

2012 ◽  
Vol 625 ◽  
pp. 218-221 ◽  
Author(s):  
Chao Yang ◽  
Yong Mei Li ◽  
Shan Liu ◽  
Yao Chun Yao
Keyword(s):  
Composite Material ◽  
Citric Acid ◽  
Discharge Rate ◽  
Carbon Sources ◽  
High Rate ◽  
Rate Performance ◽  
Solid State Method ◽  
Positive Material ◽  
State Method ◽  
High Rate Performance

Two kinds of carbon sources and their mixtures with different proportions were employed to prepare the LiFePO4/C composite material by high temperature solid state method. Precursor materials with different carbon sources were prepared by planetary ball-milling without dispersant. Results showed that the various precursors had different effect on the uniformity of the mixing and the crystallinity of the LiFePO4/C positive material. The mixed carbon sources had better effects on the performance of positive material. When the ratio of sucrose and citric acid was 1:3 (75% citric acid), the discharge capacity of LiFePO4/C composite material was 144.1 mAh/g at the discharge rate of 0.2C. Its high-rate performance was also better.

Effects of Mg2+ and Ti4+ Doping on Performance of LiFePO4 for Lithium-Ion Batteries

2013 ◽  
Vol 815 ◽  
pp. 423-426
Author(s):  
Xiao Peng Huang ◽  
Chao Yang ◽  
Yao Chun Yao
Keyword(s):  
Electrochemical Performance ◽  
Discharge Rate ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Rate ◽  
Rate Performance ◽  
Solid State Method ◽  
State Method ◽  
High Rate Performance ◽  
Discharge Measurements

Stoichiometric Mg2+ and Ti4+ with different proportions were doped to prepare the LiFe1-x-yMgxTiyPO4 cathode materials by high temperature solid state method. The samples were investigated with XRD, SEM and charge/discharge measurements. Results show that doping of Mg2+ and Ti4+ distinctly changes the paticle sizes and morphologies, which leads to a improvement of electrochemical performance. The mix-doped LiFe0.98Mg0.01Ti0.01PO4 material shows the best electrochemical performance due to its smaller crystalline particles and lower the polarization. At the discharge rate of 0.1C, the initial specific capacity of LiFe0.98Mg0.01Ti0.01PO4 is 105.78 mAh·g-1, its high-rate performance is also better.

The enhanced rate performance of LiFe0.5Mn0.5PO4/C cathode material via synergistic strategies of surfactant-assisted solid state method and carbon coating

2015 ◽  
Vol 3 (3) ◽  
pp. 996-1004 ◽  
Author(s):  
Xue Zhou ◽  
Ye Xie ◽  
Yuanfu Deng ◽  
Xusong Qin ◽  
Guohua Chen
Keyword(s):  
Solid State ◽  
Cathode Material ◽  
Carbon Content ◽  
Carbon Coating ◽  
High Rate ◽  
Cycle Performance ◽  
Rate Performance ◽  
Solid State Method ◽  
State Method ◽  
Surfactant Assisted

A high rate and cycle performance LiFe0.5Mn0.5PO4/C material was obtained by synergies of a surfactant-assisted solid state method and carbon content.

Spherical Ni-doped LiMn0.6Fe0.4PO4/C composites with high-rate performance

Ionics ◽  
2021 ◽  
Author(s):  
Shiyu Tian ◽  
Kaicheng Zhang ◽  
Jingrui Cao ◽  
Hongyuan Guo ◽  
Ruoxuan Liu ◽  
...  
Keyword(s):  
High Rate ◽  
Rate Performance ◽  
High Rate Performance

scholarly journals Enhancing Li-ion capacity and rate capability in cation-defective vanadium ferrite aerogels via aluminum substitution

RSC Advances ◽  
2021 ◽  
Vol 11 (24) ◽  
pp. 14495-14503
Author(s):  
Christopher N. Chervin ◽  
Ryan H. DeBlock ◽  
Joseph F. Parker ◽  
Bethany M. Hudak ◽  
Nathaniel L. Skeele ◽  
...  
Keyword(s):  
Rate Capability ◽  
High Rate ◽  
Rate Performance ◽  
Li Ion ◽  
High Rate Performance ◽  
Aluminum Substitution

Substituting electroinactive Al3+ into vanadium ferrite aerogels boosts capacity to battery-relevant levels but in a material that expresses pseudocapacitive character and high-rate performance.

Ultra‐long cycle life and high rate performance subglobose Na 3 V 2 ( PO 4 ) 2 F 3 @C cathode and its regulation

2020 ◽  
Vol 44 (8) ◽  
pp. 6608-6622 ◽  
Author(s):  
Wen‐xing Zhan ◽  
Chang‐ling Fan ◽  
Wei‐hua Zhang ◽  
Guo‐dong Yi ◽  
Han Chen ◽  
...  
Keyword(s):  
Cycle Life ◽  
High Rate ◽  
Rate Performance ◽  
Long Cycle ◽  
Long Cycle Life ◽  
High Rate Performance

Bismuthene from sonoelectrochemistry as a superior anode for potassium-ion batteries

2020 ◽  
Vol 8 (1) ◽  
pp. 453-460 ◽  
Author(s):  
Chao Shen ◽  
Tianle Cheng ◽  
Chunyan Liu ◽  
Lu Huang ◽  
Mengyang Cao ◽  
...  
Keyword(s):  
Force Field ◽  
External Force ◽  
Potassium Ion ◽  
Cycle Life ◽  
High Rate ◽  
Rate Performance ◽  
Electrochemical Exfoliation ◽  
Long Cycle Life ◽  
External Force Field ◽  
High Rate Performance

An external force field-assisted electrochemical exfoliation method was adopted to produce few-layered bismuthene nanosheets (FBNs). These FBNs exhibited a high rate performance and ultra-long cycle life for KIBs anode.

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