Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon Additives
The influence of different conductive additives (carbon nanofibers (CNFs), carbon nanoplatelets, and pyrolytic carbon from sucrose (Sucr) or polyvinylidene fluoride) on the morphology, electron conductivity, and electrochemical performance of LiFePO<sub>4</sub>-based cathodes was investi...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Batteries |
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| Online Access: | https://www.mdpi.com/2313-0105/8/9/111 |
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| author | Irina Stenina Polina Minakova Tatiana Kulova Andrey Yaroslavtsev |
| author_facet | Irina Stenina Polina Minakova Tatiana Kulova Andrey Yaroslavtsev |
| author_sort | Irina Stenina |
| collection | DOAJ |
| description | The influence of different conductive additives (carbon nanofibers (CNFs), carbon nanoplatelets, and pyrolytic carbon from sucrose (Sucr) or polyvinylidene fluoride) on the morphology, electron conductivity, and electrochemical performance of LiFePO<sub>4</sub>-based cathodes was investigated to develop the most efficient strategy for the fabrication of high-rate cathodes. Pyrolytic carbon effectively prevents the growth of LiFePO<sub>4</sub> grains and provides contact between them, CNFs provide fast long-range conductive pathways, while carbon nanoplatelets can be embedded in carbon coatings as high-conductive “points” which enhance the rate capability and decrease the capacity fading of LFP. The LiFePO<sub>4</sub>/C<sub>Sucr</sub>/CNF showed better performance than the other cathodes due to the synergy of the high-conductive CNF network (the electronic conductivity was 1.3 × 10<sup>−2</sup> S/cm) and the shorter Li<sup>+</sup> ion path (the lithium-ion diffusion coefficient was 2.1 × 10<sup>−11</sup> cm<sup>2</sup>/s). It is shown that the formation of composites based on LFP and carbon nanomaterials via mortar grinding is a more promising strategy for electrode material manufacturing than ball milling. |
| first_indexed | 2024-03-10T00:44:06Z |
| format | Article |
| id | doaj.art-5fd1695c49c948b5be3bdcfcf6645b01 |
| institution | Directory Open Access Journal |
| issn | 2313-0105 |
| language | English |
| last_indexed | 2024-03-10T00:44:06Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Batteries |
| spelling | doaj.art-5fd1695c49c948b5be3bdcfcf6645b012023-11-23T15:03:06ZengMDPI AGBatteries2313-01052022-09-018911110.3390/batteries8090111Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon AdditivesIrina Stenina0Polina Minakova1Tatiana Kulova2Andrey Yaroslavtsev3Kurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prospekt 31, Moscow 119991, RussiaKurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prospekt 31, Moscow 119991, RussiaFrumkin Institute of Physical Chemistry and Electrochemistry, Russian Academy of Sciences, Leninsky prospekt 31-4, Moscow 119071, RussiaKurnakov Institute of General and Inorganic Chemistry, Russian Academy of Sciences, Leninsky prospekt 31, Moscow 119991, RussiaThe influence of different conductive additives (carbon nanofibers (CNFs), carbon nanoplatelets, and pyrolytic carbon from sucrose (Sucr) or polyvinylidene fluoride) on the morphology, electron conductivity, and electrochemical performance of LiFePO<sub>4</sub>-based cathodes was investigated to develop the most efficient strategy for the fabrication of high-rate cathodes. Pyrolytic carbon effectively prevents the growth of LiFePO<sub>4</sub> grains and provides contact between them, CNFs provide fast long-range conductive pathways, while carbon nanoplatelets can be embedded in carbon coatings as high-conductive “points” which enhance the rate capability and decrease the capacity fading of LFP. The LiFePO<sub>4</sub>/C<sub>Sucr</sub>/CNF showed better performance than the other cathodes due to the synergy of the high-conductive CNF network (the electronic conductivity was 1.3 × 10<sup>−2</sup> S/cm) and the shorter Li<sup>+</sup> ion path (the lithium-ion diffusion coefficient was 2.1 × 10<sup>−11</sup> cm<sup>2</sup>/s). It is shown that the formation of composites based on LFP and carbon nanomaterials via mortar grinding is a more promising strategy for electrode material manufacturing than ball milling.https://www.mdpi.com/2313-0105/8/9/111cathodelithium-ion batteriesLiFePO<sub>4</sub>PVDFcarbon nanofibersball milling |
| spellingShingle | Irina Stenina Polina Minakova Tatiana Kulova Andrey Yaroslavtsev Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon Additives Batteries cathode lithium-ion batteries LiFePO<sub>4</sub> PVDF carbon nanofibers ball milling |
| title | Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon Additives |
| title_full | Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon Additives |
| title_fullStr | Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon Additives |
| title_full_unstemmed | Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon Additives |
| title_short | Electrochemical Properties of LiFePO<sub>4</sub> Cathodes: The Effect of Carbon Additives |
| title_sort | electrochemical properties of lifepo sub 4 sub cathodes the effect of carbon additives |
| topic | cathode lithium-ion batteries LiFePO<sub>4</sub> PVDF carbon nanofibers ball milling |
| url | https://www.mdpi.com/2313-0105/8/9/111 |
| work_keys_str_mv | AT irinastenina electrochemicalpropertiesoflifeposub4subcathodestheeffectofcarbonadditives AT polinaminakova electrochemicalpropertiesoflifeposub4subcathodestheeffectofcarbonadditives AT tatianakulova electrochemicalpropertiesoflifeposub4subcathodestheeffectofcarbonadditives AT andreyyaroslavtsev electrochemicalpropertiesoflifeposub4subcathodestheeffectofcarbonadditives |