Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors
Two kinds of functionalized graphene sheets were produced by thermal exfoliation of graphite oxide. The first kind of functionalized graphene sheets was obtained by thermal exfoliation of graphite oxide at low temperature in air. The second kind was prepared by carbonization of the first kind of fun...
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| Veröffentlicht in: | Electrochimica acta 2010-04, Vol.55 (12), p.3897-3903 |
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| container_title | Electrochimica acta |
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| creator | Du, Qinglai Zheng, Mingbo Zhang, Lifeng Wang, Yongwen Chen, Jinhua Xue, Luping Dai, Weijie Ji, Guangbin Cao, Jieming |
| description | Two kinds of functionalized graphene sheets were produced by thermal exfoliation of graphite oxide. The first kind of functionalized graphene sheets was obtained by thermal exfoliation of graphite oxide at low temperature in air. The second kind was prepared by carbonization of the first kind of functionalized graphene sheets at higher temperature in N
2. Scanning electron microscopy images show that both two kinds of samples possess nanoporous structures. The results of N
2 adsorption–desorption analysis indicate that both of two kinds of samples have high BET surface areas. Moreover, the second kind of functionalized graphene sheets has a relatively higher BET surface area. The results of electrochemical tests is as follows: the specific capacitance values of the first kind of functionalized graphene sheets in aqueous KOH electrolyte are about 230
F
g
−1; the specific capacitance values of the second kind of functionalized graphene sheets with higher BET surface areas are only about 100
F
g
−1; however, compared with the first kind of functionalized graphene sheets, the second kind has a higher capacitance retention at large current density because of its good conductive behaviors; furthermore, in non-aqueous EC/DEC electrolyte, the specific capacitance values of the first kind sample and the second kind sample are about 73
F
g
−1 and 36
F
g
−1, respectively. |
| doi_str_mv | 10.1016/j.electacta.2010.01.089 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_cross</sourceid><recordid>TN_cdi_proquest_miscellaneous_861570964</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><els_id>S0013468610001787</els_id><sourcerecordid>861570964</sourcerecordid><originalsourceid>FETCH-LOGICAL-c377t-8592ab17a952507f597f5bb7e59c6367bfc0c8f58f541fb492d6c1df4b2e243e3</originalsourceid><addsrcrecordid>eNqFkcFu1DAQhi0EEkvpM-AL4pTFdhI7OVYVFKRKcKBnazIZN14lcbCThfIafWG8bNUr0li2rG_-mV8_Y--k2Esh9cfDnkbCFXLtlci_Qu5F075gO9mYsiibun3JdkLIsqh0o1-zNykdhBBGG7Fjj98jLRBh9WHmwXG3zXh6w-j_UM_vIywDzcTTQLQm3j1w4GP4Vaw0LZTbtkh8HShOMHL67cLoz1KwLDEADhzm_gT4yP-tGQMONHnMeNqyAsIC6Fd_JN7RAEcfYnrLXjkYE10-3Rfs7vOnH9dfittvN1-vr24LLI1Zi2xMQScNtLWqhXF1m0_XGapb1KU2nUOBjatzVdJ1Vat6jbJ3VadIVSWVF-zDWTev-nOjtNrJJ6RxhJnClmyjZW1Eq6tMmjOJMaQUydkl-gnig5XCnlKwB_ucgj2lYIW0OYXc-f5pBqRs2kWY0afndqW0alXTZO7qzFE2fPQUbUJPM1LvY9a1ffD_nfUXqrum5g</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>861570964</pqid></control><display><type>article</type><title>Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors</title><source>ScienceDirect Journals (5 years ago - present)</source><creator>Du, Qinglai ; Zheng, Mingbo ; Zhang, Lifeng ; Wang, Yongwen ; Chen, Jinhua ; Xue, Luping ; Dai, Weijie ; Ji, Guangbin ; Cao, Jieming</creator><creatorcontrib>Du, Qinglai ; Zheng, Mingbo ; Zhang, Lifeng ; Wang, Yongwen ; Chen, Jinhua ; Xue, Luping ; Dai, Weijie ; Ji, Guangbin ; Cao, Jieming</creatorcontrib><description>Two kinds of functionalized graphene sheets were produced by thermal exfoliation of graphite oxide. The first kind of functionalized graphene sheets was obtained by thermal exfoliation of graphite oxide at low temperature in air. The second kind was prepared by carbonization of the first kind of functionalized graphene sheets at higher temperature in N
2. Scanning electron microscopy images show that both two kinds of samples possess nanoporous structures. The results of N
2 adsorption–desorption analysis indicate that both of two kinds of samples have high BET surface areas. Moreover, the second kind of functionalized graphene sheets has a relatively higher BET surface area. The results of electrochemical tests is as follows: the specific capacitance values of the first kind of functionalized graphene sheets in aqueous KOH electrolyte are about 230
F
g
−1; the specific capacitance values of the second kind of functionalized graphene sheets with higher BET surface areas are only about 100
F
g
−1; however, compared with the first kind of functionalized graphene sheets, the second kind has a higher capacitance retention at large current density because of its good conductive behaviors; furthermore, in non-aqueous EC/DEC electrolyte, the specific capacitance values of the first kind sample and the second kind sample are about 73
F
g
−1 and 36
F
g
−1, respectively.</description><identifier>ISSN: 0013-4686</identifier><identifier>EISSN: 1873-3859</identifier><identifier>DOI: 10.1016/j.electacta.2010.01.089</identifier><identifier>CODEN: ELCAAV</identifier><language>eng</language><publisher>Kidlington: Elsevier Ltd</publisher><subject>Applied sciences ; Capacitance ; Capacitors. Resistors. Filters ; Electrical engineering. Electrical power engineering ; Electrochemical measurements ; Electrolytes ; Exact sciences and technology ; Exfoliation ; Functionalized graphene sheets ; Graphene ; Graphite ; Nanostructure ; Oxides ; Pseudocapacitance ; Supercapacitor ; Surface area ; Thermal exfoliation ; Various equipment and components</subject><ispartof>Electrochimica acta, 2010-04, Vol.55 (12), p.3897-3903</ispartof><rights>2010 Elsevier Ltd</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c377t-8592ab17a952507f597f5bb7e59c6367bfc0c8f58f541fb492d6c1df4b2e243e3</citedby><cites>FETCH-LOGICAL-c377t-8592ab17a952507f597f5bb7e59c6367bfc0c8f58f541fb492d6c1df4b2e243e3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.electacta.2010.01.089$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22629288$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Du, Qinglai</creatorcontrib><creatorcontrib>Zheng, Mingbo</creatorcontrib><creatorcontrib>Zhang, Lifeng</creatorcontrib><creatorcontrib>Wang, Yongwen</creatorcontrib><creatorcontrib>Chen, Jinhua</creatorcontrib><creatorcontrib>Xue, Luping</creatorcontrib><creatorcontrib>Dai, Weijie</creatorcontrib><creatorcontrib>Ji, Guangbin</creatorcontrib><creatorcontrib>Cao, Jieming</creatorcontrib><title>Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors</title><title>Electrochimica acta</title><description>Two kinds of functionalized graphene sheets were produced by thermal exfoliation of graphite oxide. The first kind of functionalized graphene sheets was obtained by thermal exfoliation of graphite oxide at low temperature in air. The second kind was prepared by carbonization of the first kind of functionalized graphene sheets at higher temperature in N
2. Scanning electron microscopy images show that both two kinds of samples possess nanoporous structures. The results of N
2 adsorption–desorption analysis indicate that both of two kinds of samples have high BET surface areas. Moreover, the second kind of functionalized graphene sheets has a relatively higher BET surface area. The results of electrochemical tests is as follows: the specific capacitance values of the first kind of functionalized graphene sheets in aqueous KOH electrolyte are about 230
F
g
−1; the specific capacitance values of the second kind of functionalized graphene sheets with higher BET surface areas are only about 100
F
g
−1; however, compared with the first kind of functionalized graphene sheets, the second kind has a higher capacitance retention at large current density because of its good conductive behaviors; furthermore, in non-aqueous EC/DEC electrolyte, the specific capacitance values of the first kind sample and the second kind sample are about 73
F
g
−1 and 36
F
g
−1, respectively.</description><subject>Applied sciences</subject><subject>Capacitance</subject><subject>Capacitors. Resistors. Filters</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrochemical measurements</subject><subject>Electrolytes</subject><subject>Exact sciences and technology</subject><subject>Exfoliation</subject><subject>Functionalized graphene sheets</subject><subject>Graphene</subject><subject>Graphite</subject><subject>Nanostructure</subject><subject>Oxides</subject><subject>Pseudocapacitance</subject><subject>Supercapacitor</subject><subject>Surface area</subject><subject>Thermal exfoliation</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>eNqFkcFu1DAQhi0EEkvpM-AL4pTFdhI7OVYVFKRKcKBnazIZN14lcbCThfIafWG8bNUr0li2rG_-mV8_Y--k2Esh9cfDnkbCFXLtlci_Qu5F075gO9mYsiibun3JdkLIsqh0o1-zNykdhBBGG7Fjj98jLRBh9WHmwXG3zXh6w-j_UM_vIywDzcTTQLQm3j1w4GP4Vaw0LZTbtkh8HShOMHL67cLoz1KwLDEADhzm_gT4yP-tGQMONHnMeNqyAsIC6Fd_JN7RAEcfYnrLXjkYE10-3Rfs7vOnH9dfittvN1-vr24LLI1Zi2xMQScNtLWqhXF1m0_XGapb1KU2nUOBjatzVdJ1Vat6jbJ3VadIVSWVF-zDWTev-nOjtNrJJ6RxhJnClmyjZW1Eq6tMmjOJMaQUydkl-gnig5XCnlKwB_ucgj2lYIW0OYXc-f5pBqRs2kWY0afndqW0alXTZO7qzFE2fPQUbUJPM1LvY9a1ffD_nfUXqrum5g</recordid><startdate>20100430</startdate><enddate>20100430</enddate><creator>Du, Qinglai</creator><creator>Zheng, Mingbo</creator><creator>Zhang, Lifeng</creator><creator>Wang, Yongwen</creator><creator>Chen, Jinhua</creator><creator>Xue, Luping</creator><creator>Dai, Weijie</creator><creator>Ji, Guangbin</creator><creator>Cao, Jieming</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>20100430</creationdate><title>Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors</title><author>Du, Qinglai ; Zheng, Mingbo ; Zhang, Lifeng ; Wang, Yongwen ; Chen, Jinhua ; Xue, Luping ; Dai, Weijie ; Ji, Guangbin ; Cao, Jieming</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c377t-8592ab17a952507f597f5bb7e59c6367bfc0c8f58f541fb492d6c1df4b2e243e3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Applied sciences</topic><topic>Capacitance</topic><topic>Capacitors. Resistors. Filters</topic><topic>Electrical engineering. Electrical power engineering</topic><topic>Electrochemical measurements</topic><topic>Electrolytes</topic><topic>Exact sciences and technology</topic><topic>Exfoliation</topic><topic>Functionalized graphene sheets</topic><topic>Graphene</topic><topic>Graphite</topic><topic>Nanostructure</topic><topic>Oxides</topic><topic>Pseudocapacitance</topic><topic>Supercapacitor</topic><topic>Surface area</topic><topic>Thermal exfoliation</topic><topic>Various equipment and components</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Du, Qinglai</creatorcontrib><creatorcontrib>Zheng, Mingbo</creatorcontrib><creatorcontrib>Zhang, Lifeng</creatorcontrib><creatorcontrib>Wang, Yongwen</creatorcontrib><creatorcontrib>Chen, Jinhua</creatorcontrib><creatorcontrib>Xue, Luping</creatorcontrib><creatorcontrib>Dai, Weijie</creatorcontrib><creatorcontrib>Ji, Guangbin</creatorcontrib><creatorcontrib>Cao, Jieming</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>Du, Qinglai</au><au>Zheng, Mingbo</au><au>Zhang, Lifeng</au><au>Wang, Yongwen</au><au>Chen, Jinhua</au><au>Xue, Luping</au><au>Dai, Weijie</au><au>Ji, Guangbin</au><au>Cao, Jieming</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors</atitle><jtitle>Electrochimica acta</jtitle><date>2010-04-30</date><risdate>2010</risdate><volume>55</volume><issue>12</issue><spage>3897</spage><epage>3903</epage><pages>3897-3903</pages><issn>0013-4686</issn><eissn>1873-3859</eissn><coden>ELCAAV</coden><abstract>Two kinds of functionalized graphene sheets were produced by thermal exfoliation of graphite oxide. The first kind of functionalized graphene sheets was obtained by thermal exfoliation of graphite oxide at low temperature in air. The second kind was prepared by carbonization of the first kind of functionalized graphene sheets at higher temperature in N
2. Scanning electron microscopy images show that both two kinds of samples possess nanoporous structures. The results of N
2 adsorption–desorption analysis indicate that both of two kinds of samples have high BET surface areas. Moreover, the second kind of functionalized graphene sheets has a relatively higher BET surface area. The results of electrochemical tests is as follows: the specific capacitance values of the first kind of functionalized graphene sheets in aqueous KOH electrolyte are about 230
F
g
−1; the specific capacitance values of the second kind of functionalized graphene sheets with higher BET surface areas are only about 100
F
g
−1; however, compared with the first kind of functionalized graphene sheets, the second kind has a higher capacitance retention at large current density because of its good conductive behaviors; furthermore, in non-aqueous EC/DEC electrolyte, the specific capacitance values of the first kind sample and the second kind sample are about 73
F
g
−1 and 36
F
g
−1, respectively.</abstract><cop>Kidlington</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.electacta.2010.01.089</doi><tpages>7</tpages></addata></record> |
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| subjects | Applied sciences Capacitance Capacitors. Resistors. Filters Electrical engineering. Electrical power engineering Electrochemical measurements Electrolytes Exact sciences and technology Exfoliation Functionalized graphene sheets Graphene Graphite Nanostructure Oxides Pseudocapacitance Supercapacitor Surface area Thermal exfoliation Various equipment and components |
| title | Preparation of functionalized graphene sheets by a low-temperature thermal exfoliation approach and their electrochemical supercapacitive behaviors |
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