Electrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteries
Lithium polymer batteries (LPBs) are considered to be the most promising alternatives to current lithium-ion batteries (LIBs), which have been known to exhibit certain safety issues. However, the relatively poor electrochemical performances of LPBs hinder their practical usage, particularly at high...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2020-01-01
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| Series: | Materials Research Express |
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| Online Access: | https://doi.org/10.1088/2053-1591/aba55c |
| _version_ | 1827868635769602048 |
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| author | Balasubramaniyan Rajagopalan Min Kim Do Youb Kim Jungdon Suk Dong Wook Kim Yongku Kang |
| author_facet | Balasubramaniyan Rajagopalan Min Kim Do Youb Kim Jungdon Suk Dong Wook Kim Yongku Kang |
| author_sort | Balasubramaniyan Rajagopalan |
| collection | DOAJ |
| description | Lithium polymer batteries (LPBs) are considered to be the most promising alternatives to current lithium-ion batteries (LIBs), which have been known to exhibit certain safety issues. However, the relatively poor electrochemical performances of LPBs hinder their practical usage, particularly at high C-rates, moderate temperatures, and/or with high loading densities. Therefore, this study analyzes the use of a novel composite electrode for manufacturing room-temperature operable LPBs with high loading densities. Rapid decay in the rate capabilities of LPBs at high C-rates is found to be attributable to the increased electrical resistance in an electrode. To account for this, this study modified the composite electrode with various conducting fillers. Subsequently, the effect of the type and content of the conducting fillers on the performance of LPBs was systematically investigated using the composite electrode. The incorporation of the conducting fillers in the lithium iron phosphate (LFP) composite electrode was found to effectively reduce the electrical resistance and consequently improve the electrochemical performance of LPBs. Furthermore, LFP composite electrodes with a mixture of structurally different graphene (G) and carbon nanotube (CNT) (1 wt%) were observed to demonstrate synergistic effects on improving the electrochemical performance of LPBs. The results obtained in this study elucidate that the facilitated electrical conduction within a composite electrode is critically important for the performance of LPBs and the expedited diffusion of Li ^+ . |
| first_indexed | 2024-03-12T15:34:17Z |
| format | Article |
| id | doaj.art-43fcb64c75264c8c913d87a540d6d567 |
| institution | Directory Open Access Journal |
| issn | 2053-1591 |
| language | English |
| last_indexed | 2024-03-12T15:34:17Z |
| publishDate | 2020-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Materials Research Express |
| spelling | doaj.art-43fcb64c75264c8c913d87a540d6d5672023-08-09T16:16:59ZengIOP PublishingMaterials Research Express2053-15912020-01-017707550410.1088/2053-1591/aba55cElectrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteriesBalasubramaniyan Rajagopalan0Min Kim1Do Youb Kim2https://orcid.org/0000-0002-0398-9075Jungdon Suk3Dong Wook Kim4Yongku Kang5Energy Materials Research Center, Advanced Materials Division, KRICT, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of KoreaEnergy Materials Research Center, Advanced Materials Division, KRICT, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of KoreaEnergy Materials Research Center, Advanced Materials Division, KRICT, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of KoreaEnergy Materials Research Center, Advanced Materials Division, KRICT, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea; Department of Chemical Convergence Materials, UST, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaEnergy Materials Research Center, Advanced Materials Division, KRICT, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea; Department of Chemical Convergence Materials, UST, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of KoreaEnergy Materials Research Center, Advanced Materials Division, KRICT, 141 Gajeong-ro, Yuseong-gu, Daejeon 34114, Republic of Korea; Department of Chemical Convergence Materials, UST, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea; KU-KRICT Collaborative Research Center & Division of Display and Semiconductor Physics, Korea University , 2511 Sejong-ro, Sejong, 30019, Republic of KoreaLithium polymer batteries (LPBs) are considered to be the most promising alternatives to current lithium-ion batteries (LIBs), which have been known to exhibit certain safety issues. However, the relatively poor electrochemical performances of LPBs hinder their practical usage, particularly at high C-rates, moderate temperatures, and/or with high loading densities. Therefore, this study analyzes the use of a novel composite electrode for manufacturing room-temperature operable LPBs with high loading densities. Rapid decay in the rate capabilities of LPBs at high C-rates is found to be attributable to the increased electrical resistance in an electrode. To account for this, this study modified the composite electrode with various conducting fillers. Subsequently, the effect of the type and content of the conducting fillers on the performance of LPBs was systematically investigated using the composite electrode. The incorporation of the conducting fillers in the lithium iron phosphate (LFP) composite electrode was found to effectively reduce the electrical resistance and consequently improve the electrochemical performance of LPBs. Furthermore, LFP composite electrodes with a mixture of structurally different graphene (G) and carbon nanotube (CNT) (1 wt%) were observed to demonstrate synergistic effects on improving the electrochemical performance of LPBs. The results obtained in this study elucidate that the facilitated electrical conduction within a composite electrode is critically important for the performance of LPBs and the expedited diffusion of Li ^+ .https://doi.org/10.1088/2053-1591/aba55clithium polymer batterycomposite electrodeconducting fillerelectrical conductivityloading density |
| spellingShingle | Balasubramaniyan Rajagopalan Min Kim Do Youb Kim Jungdon Suk Dong Wook Kim Yongku Kang Electrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteries Materials Research Express lithium polymer battery composite electrode conducting filler electrical conductivity loading density |
| title | Electrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteries |
| title_full | Electrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteries |
| title_fullStr | Electrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteries |
| title_full_unstemmed | Electrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteries |
| title_short | Electrical modification of a composite electrode for room temperature operable polyethylene oxide-based lithium polymer batteries |
| title_sort | electrical modification of a composite electrode for room temperature operable polyethylene oxide based lithium polymer batteries |
| topic | lithium polymer battery composite electrode conducting filler electrical conductivity loading density |
| url | https://doi.org/10.1088/2053-1591/aba55c |
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