Effect of multi-walled carbon nanotubes on the thermal stability and surface morphology of LiFePO4 cathode material
Source abstract
Abstract
A novel network composite cathode was prepared by mixing LiFePO4 particles with multiwalled carbon nanotubes (MWCNTs). LiFePO4 particles were connected by MWCNTs and a polymer binder, polypyrrole-polyethylene glycol (PPy-PEG), to form a three-dimensional network. The surface morphology and thermal stability of the LiFePO4-MWCNT/PPy-PEG composite cathode were investigated by scanning electron microscopy, thermogravimetric analysis and pyrolysis capillary gas chromatography. It was found by scanning electron microscopy that the particle size of LiFePO4 in the LiFePO4-MWCNT sample was smaller than that of the pure LiFePO4 and the structure in the LiFePO4-MWCNT/PPy-PEG sample was more homogeneous than in the LiFePO4-MWCNT/PPy sample. Thermogravimetric analysis indicated that PPy-PEG blend polymer in combination with MWCNTs considerably improves the thermal stability of the final cathode material. Pyrolysis capillary gas chromatography measurements at 500 °C showed a decreased thermal stability of organic species contained in the composite cathode material. The addition of MWCNTs was an effective way to increase homogeneity and thermal stability of the LiFePO4-MWCNT/PPy-PEG cathode material.
Source: expertdata · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advancements in Battery Materials · Advanced Battery Materials and Technologies · Advanced Battery Technologies Research
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (26)
Show source-provided references
1. The source of first-cycle capacity loos in LiFePO4[J]10.1016/S0378-7753(01)00633-4 ↗
2. Approaching theoretical capacity of LiFePO4 at room temperature at high rates[J]10.1149/1.1396695 ↗
3. Low-cost, one-step process for synthesis of carbon coated LiFePO4 cathode[J]10.1016/j.matlet.2004.07.051 ↗
4. Synthesis and electrochemical properties of olivine-type LiFePO4/C composite cathode material prepared from a poly(vinyl alcohol)-containing precursor[J]10.1016/j.jpowsour.2006.02.097 ↗
5. Impact of the carbon coating thickness on the electrochemical performance of LiFePO4/C composites[J]10.1149/1.1860492 ↗
6. Electronically conductive phospho-olivines as lithium storage electrodes[J]10.1038/nmat732 ↗
7. Toward understanding of electrical limitations (electronic, ionic) in LiMPO4 (M = Fe, Mn) electrode materials[J]10.1149/1.1884787 ↗
8. Optimized LiFePO4 for lithium battery cathodes[J]10.1149/1.1348257 ↗
9. A novel concept for the synthesis of an improved LiFePO4 lithium battery cathode[J]10.1149/1.1449302 ↗
10. Charge-discharge properties of composites of LiMn2O4 and polypyrrole as positive electrode materials for 4 V class of rechargeable Li batteries[J]10.1016/S0013-4686(99)00178-4 ↗
11. Glass-ceramics with LiFePO4 crystals and oriented crystal line patterning in glass by YAG laser irradiation[J]10.1016/j.ssi.2007.03.003 ↗
12. A novel network composite cathode of LiFePO4/multiwalled carbon nanotubes with high rate capability for lithium ion batteries[J]10.1016/j.elecom.2006.10.050 ↗
13. Effect of different carbon conductive additives on electrochemical properties of LiFePO4-C/Li batteries[J]10.1007/s10008-008-0509-3 ↗
14. Nano-LiFePO4/MWCNT cathode materials prepared by room-temperature solid-state reaction and microwave heating[J]10.1149/1.2776231 ↗
15. Molecularly imprinted polypyrrole modified carbon nanotubes on stainless steel frit for selective micro solid phase pre-concentration of ochratoxin A[J]10.1016/j.reactfunctpolym.2005.10.021 ↗
16. Multi-walled carbon nanotubes functionalized by carboxylic groups: activation of TiO2 (anatase) and phosphate olivines (LiMnPO4; LiFePO4) for electrochemical Li-storage[J]10.1016/j.jpowsour.2010.03.028 ↗
17. Multi-wall carbon nanotubes (MWCNTs)-doped polypyrrole DNA biosensor for label-free detection of genetically modified organisms by QCM and EIS[J]10.1016/j.talanta.2009.09.002 ↗
18. Application of solid polymer electrolyte to lithium/polypyrrole secondary battery system[J]10.1149/1.2055048 ↗
19. Structural and electrochemical studies of PPy/PEG-LiFePO4 cathode material for Li-ion batteries[J]10.1016/j.electacta.2009.09.060 ↗
20. Enhanced electrical conductivity of polypyrrole prepared by chemical oxidative polymerization: effect of the preparation technique and polymer additive[J]10.1016/S0032-3861(00)00116-6 ↗
21. The preparation and electrochemical performances of LiFePO4-multiwalled nanotubes composite cathode materials for lithium ion batteries[J]10.1016/j.matchemphys.2010.01.038 ↗
22. Enhanced electrochemical performance of carbon nanospheres-LiFePO4 composite by PEG based sol-gel synthesis[J]10.1016/j.electacta.2010.02.032 ↗
23. The tunable electrical conductivity of a MWCNT-reduced graphene oxide hybrid film[J]
24. A novel network composite cathode of LiFePO4/multiwalled carbon nanotubes with high rate capability for lithium ion batteries[J]10.1016/j.elecom.2006.10.050 ↗
25. Electrochemical properties of LiFePO4-multiwalled carbon nanotubes composite cathode materials for lithium polymer battery[J]10.1016/j.elecom.2008.08.001 ↗
26. Synthesis and electrochemical properties of gyroscope-like lithium iron phosphate/multiwalled carbon nanotubes composites by microwave-assisted sol-gel method[J]10.1016/j.synthmet.2011.01.008 ↗