ChemInform Abstract: Effect of Ion Doping on the Electrochemical Performances of LiFePO4-Li3V2(PO4)3Composite Cathode Materials

Ta-doped Li3V2(PO4)3 cathode material coated by carbon was synthesized via a sol-gel method. Effects of Ta5+ doping on the physical structure and electrochemical performances of the Li3V2(PO4)3/C cathode materials were investigated. Compared with the undoped sample, the Ta-doped samples had no excess peaks but the larger particle size and the narrower distribution of the particle size, indicating that Ta5+ entered into the structure of (Li1-5xTax)3V2(PO4)3/C rather than forming any impurities. When x was up to 0.01, the best electrochemical properties of the Ta-doped cathode materials had been displayed at the charge and discharge rate of 0.1C with the voltage of 3.0～4.8V. The analysis of cyclic voltammetry revealed that the polarization of the Li3V2(PO4)3/C cathode materials could be effectively decreased by Ta5+ doping(x=0.01), mainly resulting from the better electronic conductivity.

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The role of tungsten-related elements for improving the electrochemical performances of cathode materials in lithium ion batteries

Tungsten ◽

10.1007/s42864-021-00083-9 ◽

2021 ◽

Author(s):

Yong-Qi Sun ◽

Weng Fu ◽

Yu-Xiang Hu ◽

James Vaughan ◽

Lian-Zhou Wang

Keyword(s):

Lithium Ion Batteries ◽

Cathode Materials ◽

Lithium Ion ◽

Electrochemical Performances

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CNTs/LiV3O8/Y2O3 Composites with Enhanced Electrochemical Performances as Cathode Materials for Rechargeable Solid-State Lithium Metal Batteries

ACS Applied Materials & Interfaces ◽

10.1021/acsami.0c18993 ◽

2021 ◽

Vol 13 (7) ◽

pp. 8219-8228

Author(s):

Yuqiang Pi ◽

Zhiwei Gan ◽

Mengyu Yan ◽

Zheng Li ◽

Yushan Ruan ◽

...

Keyword(s):

Solid State ◽

Cathode Materials ◽

Electrochemical Performances ◽

Lithium Metal ◽

Lithium Metal Batteries

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Electrochemical performances of layered LiNi0.7CO0.3–xMxO2 (M=Al, Mn, Cr; x=0.05) cathode materials for rechargeable lithium batteries

Journal of Physics and Chemistry of Solids ◽

10.1016/j.jpcs.2007.10.074 ◽

2008 ◽

Vol 69 (5-6) ◽

pp. 1246-1248 ◽

Cited By ~ 6

Author(s):

Xinlu Li ◽

Feiyu Kang ◽

Wanci Shen ◽

Xinde Bai

Keyword(s):

Lithium Batteries ◽

Cathode Materials ◽

Electrochemical Performances ◽

Rechargeable Lithium Batteries

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Phase transitions and related electrochemical performances of Li-Rich layered cathode materials for high-energy lithium ion batteries

Journal of Alloys and Compounds ◽

10.1016/j.jallcom.2017.10.179 ◽

2018 ◽

Vol 732 ◽

pp. 385-395 ◽

Cited By ~ 11

Author(s):

Jianqing Zhao ◽

Xiaoxiao Kuai ◽

Xinyu Dong ◽

Haibo Wang ◽

Wei Zhao ◽

...

Keyword(s):

Phase Transitions ◽

Lithium Ion Batteries ◽

Cathode Materials ◽

Lithium Ion ◽

High Energy ◽

Electrochemical Performances ◽

Layered Cathode Materials

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Multifunctional Li2O-2B2O3 coating for enhancing high voltage electrochemical performances and thermal stability of layered structured LiNi0.5Co0.2Mn0.3O2 cathode materials for lithium ion batteries

Electrochimica Acta ◽

10.1016/j.electacta.2015.06.111 ◽

2015 ◽

Vol 174 ◽

pp. 1225-1233 ◽

Cited By ~ 46

Author(s):

Ding Wang ◽

Xinhai Li ◽

Zhixing Wang ◽

Huajun Guo ◽

Xin Chen ◽

...

Keyword(s):

Thermal Stability ◽

Lithium Ion Batteries ◽

High Voltage ◽

Cathode Materials ◽

Lithium Ion ◽

Electrochemical Performances ◽

Thermal Stability Of

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Tris(trimethylsilyl) phosphite (TMSPi) as an electrolyte additive for LiNi0.5Co0.2Mn0.3O2 cathode materials at elevated voltage and temperature

Functional Materials Letters ◽

10.1142/s1793604721510449 ◽

2021 ◽

Author(s):

Xiao Yu ◽

Zhiyong Yu ◽

Jishen Hao ◽

Hanxing Liu

Keyword(s):

Discharge Capacity ◽

Cathode Materials ◽

Solid Electrolyte Interphase ◽

Rate Capability ◽

Electrochemical Performances ◽

Initial Discharge Capacity ◽

Capacity Retention ◽

Electrolyte Additive ◽

Interface Impedance ◽

Initial Discharge

Electrolyte additive tris(trimethylsilyl) phosphite (TMSPi) was used to promote the electrochemical performances of LiNi[Formula: see text]Co[Formula: see text]Mn[Formula: see text]O2 (NCM523) at elevated voltage (4.5 V) and temperature (55[Formula: see text]C). The NCM523 in 2.0 wt.% TMSPi-added electrolyte exhibited a much higher capacity (166.8 mAh/g) than that in the baseline electrolyte (118.3 mAh/g) after 100 cycles under 4.5 V at 30[Formula: see text]C. Simultaneously, the NCM523 with 2.0 wt.% TMSPi showed superior rate capability compared to that without TMSPi. Besides, after 100 cycles at 55[Formula: see text]C under 4.5 V, the discharge capacity retention reached 87.4% for the cell with 2.0 wt.% TMSPi, however, only 24.4% of initial discharge capacity was left for the cell with the baseline electrolyte. A series of analyses (TEM, XPS and EIS) confirmed that TMSPi-derived solid electrolyte interphase (SEI) stabilized the electrode/electrolyte interface and hindered the increase of interface impedance, resulting in obviously enhanced electrochemical performances of NCM523 cathode materials under elevated voltage and/or temperature.

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Serial Disulfide Polymers as Cathode Materials in Lithium-Sulfur Battery: Materials Optimization and Electrochemical Characterization

Applied Sciences ◽

10.3390/app10072538 ◽

2020 ◽

Vol 10 (7) ◽

pp. 2538

Author(s):

Jing Wang ◽

Shichao Zhang

Keyword(s):

Carbon Black ◽

Cathode Materials ◽

Retention Rate ◽

Specific Capacity ◽

Peanut Oil ◽

Electrochemical Performances ◽

Capacity Retention ◽

Tung Oil ◽

Conductive Carbon Black ◽

Copolymer Poly

Herein, a series of novel disulfide polymers were synthesized by using the raw materials of diallyl-o-phthalate, tung oil, peanut oil, and styrene. Four kinds of products: Poly (sulfur-diallyl-o-phthalate) copolymer, poly (sulfur-tung oil) copolymer, poly (sulfur-peanut oil) copolymer, and poly (sulfur-styrene-peanut oil) terpolymer were characterized, and their solubility was studied and compared. Among the four kinds of disulfide polymers, poly (sulfur-styrene-peanut oil) terpolymer had the best solubility in an organic solvent, and it was chosen to be the active cathode material in Li-S battery. Subsequently, two different conductive additives—conductive carbon black and graphene were separately blended with this terpolymer to prepare two battery systems. The electrochemical performances of the two batteries were compared and analyzed. The result showed that the initial specific capacity of poly (sulfur-styrene-peanut oil) terpolymer (blended with conductive carbon black) battery was 935.88 mAh/g, with the capacity retention rate about 43.5%. Comparingly, the initial specific capacity of poly (sulfur-styrene-peanut oil) terpolymer (blended with graphene) battery was 1008.35 mAh/g, with the capacity retention rate around 60.59%. Therefore, the battery system of poly (sulfur-styrene-peanut oil) terpolymer with graphene showed a more stable cycle performance and better rate performance. This optimized system had a simple and environmental-friendly synthesis procedure, which showed a great application value in constructing cathode materials for the Li-S battery.

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