Rate capability of graphite materials as negative electrodes in lithium-ion capacitors
The lithium-ion exchange rate capability of various commercial graphite materials are evaluated using galvanostatic charge/discharge cycling in a half-cell configuration over a wide range of C-rates (0.1–60 C). The results confirm that graphite is capable of de-intercalating stored charge at high ra...
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| Veröffentlicht in: | Electrochimica acta 2010-03, Vol.55 (9), p.3330-3335 |
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| creator | Sivakkumar, S.R. Nerkar, J.Y. Pandolfo, A.G. |
| description | The lithium-ion exchange rate capability of various commercial graphite materials are evaluated using galvanostatic charge/discharge cycling in a half-cell configuration over a wide range of C-rates (0.1–60
C). The results confirm that graphite is capable of de-intercalating stored charge at high rates, but has a poor intercalating rate capability. Decreasing the graphite coating thickness leads to a limited rate performance improvement of the electrode. Reducing the graphite particle size shows enhanced C-rate capability but with increased irreversible capacity loss (ICL). It is demonstrated that the rate of intercalation of lithium-ions into the graphite is significantly limited compared with the corresponding rate of de-intercalation at high C-rates. For the successful utilisation of commercially available conventional graphite as a negative electrode in a lithium-ion capacitor (LIC), its intercalation rate capability needs to be improved or oversized to accommodate high charge rates. |
| doi_str_mv | 10.1016/j.electacta.2010.01.059 |
| format | Article |
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C). The results confirm that graphite is capable of de-intercalating stored charge at high rates, but has a poor intercalating rate capability. Decreasing the graphite coating thickness leads to a limited rate performance improvement of the electrode. Reducing the graphite particle size shows enhanced C-rate capability but with increased irreversible capacity loss (ICL). It is demonstrated that the rate of intercalation of lithium-ions into the graphite is significantly limited compared with the corresponding rate of de-intercalation at high C-rates. For the successful utilisation of commercially available conventional graphite as a negative electrode in a lithium-ion capacitor (LIC), its intercalation rate capability needs to be improved or oversized to accommodate high charge rates.</description><subject>Applied sciences</subject><subject>Asymmetric capacitor</subject><subject>Capacitors</subject><subject>Capacitors. Resistors. Filters</subject><subject>Charge</subject><subject>Charge materials</subject><subject>Cycles</subject><subject>EDLC</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrodes</subject><subject>Exact sciences and technology</subject><subject>Graphite</subject><subject>Graphite anode</subject><subject>Graphite rate capability</subject><subject>Intercalation</subject><subject>Lithium-ion capacitor</subject><subject>Particle size</subject><subject>Supercapacitor</subject><subject>Various equipment and components</subject><issn>0013-4686</issn><issn>1873-3859</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><recordid>eNqFkFtLwzAUx4MoOKefwb6IT61J0zTN4xjeYCCI-hpO09MtozeTbrBvb3Zhr0IgcPK_nPwIuWc0YZTlT-sEGzQjhJOkNEwpS6hQF2TCCsljXgh1SSaUMh5neZFfkxvv15RSmUs6IT-fMGJkYIDSNnbcRX0dLR0MKxvGbXhzFhofgY86XMJotxgd6lxfoY9sFwXTym7a2PbdIcbYsXf-llzVwYd3p3tKvl-ev-Zv8eLj9X0-W8Qmy_gY16lQpjR1WDsvZSmUEFiWOUiVsrTIlGDUAKeCATCsKyWMkqzMZMmKjDPB-JQ8HnMH1_9u0I-6td5g00CH_cZrKbgMBLgKSnlUGtd777DWg7MtuJ1mVO9B6rU-g9R7kJoyHUAG58OpA7yBpnbQGevP9jTNKedKBt3sqMPw4a1Fp72x2BmsrAu5uurtv11_1nKNwg</recordid><startdate>20100330</startdate><enddate>20100330</enddate><creator>Sivakkumar, S.R.</creator><creator>Nerkar, J.Y.</creator><creator>Pandolfo, A.G.</creator><general>Elsevier Ltd</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20100330</creationdate><title>Rate capability of graphite materials as negative electrodes in lithium-ion capacitors</title><author>Sivakkumar, S.R. ; Nerkar, J.Y. ; Pandolfo, A.G.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c443t-f259cbcf0106b7b5955ebb6a79212849510ca3051aa1efd95c971b47b18431513</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Applied sciences</topic><topic>Asymmetric capacitor</topic><topic>Capacitors</topic><topic>Capacitors. Resistors. Filters</topic><topic>Charge</topic><topic>Charge materials</topic><topic>Cycles</topic><topic>EDLC</topic><topic>Electrical engineering. Electrical power engineering</topic><topic>Electrodes</topic><topic>Exact sciences and technology</topic><topic>Graphite</topic><topic>Graphite anode</topic><topic>Graphite rate capability</topic><topic>Intercalation</topic><topic>Lithium-ion capacitor</topic><topic>Particle size</topic><topic>Supercapacitor</topic><topic>Various equipment and components</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sivakkumar, S.R.</creatorcontrib><creatorcontrib>Nerkar, J.Y.</creatorcontrib><creatorcontrib>Pandolfo, A.G.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Electrochimica acta</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sivakkumar, S.R.</au><au>Nerkar, J.Y.</au><au>Pandolfo, A.G.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Rate capability of graphite materials as negative electrodes in lithium-ion capacitors</atitle><jtitle>Electrochimica acta</jtitle><date>2010-03-30</date><risdate>2010</risdate><volume>55</volume><issue>9</issue><spage>3330</spage><epage>3335</epage><pages>3330-3335</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><coden>ELCAAV</coden><abstract>The lithium-ion exchange rate capability of various commercial graphite materials are evaluated using galvanostatic charge/discharge cycling in a half-cell configuration over a wide range of C-rates (0.1–60
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| source | Elsevier ScienceDirect Journals |
| subjects | Applied sciences Asymmetric capacitor Capacitors Capacitors. Resistors. Filters Charge Charge materials Cycles EDLC Electrical engineering. Electrical power engineering Electrodes Exact sciences and technology Graphite Graphite anode Graphite rate capability Intercalation Lithium-ion capacitor Particle size Supercapacitor Various equipment and components |
| title | Rate capability of graphite materials as negative electrodes in lithium-ion capacitors |
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