Electrochemical performances of graphene nanosheets prepared through microwave radiation
► We studied the electrochemical performances of graphene nanosheets prepared through simple, cost effective microwave radiation process. ► Graphene nanosheets based anode materials exhibit stable charge/discharge characteristics of 420 mAh g −1, which is significantly higher than the charge/dischar...
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| Veröffentlicht in: | Journal of power sources 2011-12, Vol.196 (23), p.10249-10253 |
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| container_title | Journal of power sources |
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| creator | Shanmugharaj, A.M. Choi, W.S. Lee, C.W. Ryu, Sung Hun |
| description | ► We studied the electrochemical performances of graphene nanosheets prepared through simple, cost effective microwave radiation process. ► Graphene nanosheets based anode materials exhibit stable charge/discharge characteristics of 420
mAh
g
−1, which is significantly higher than the charge/discharge profiles of natural graphite based electrodes. ► Charge-transfer resistance of graphene electrodes decreases with increasing cycle number implying its enhanced electrochemical activity.
Graphene nanosheets (GNSs) are prepared by oxidation and rapid expansion of graphite using microwave radiation. The prepared GNSs are characterized using various characterization tools. Morphological characterization using field emission scanning electron microscopy (FE-SEM) and transmission electron microscopic (TEM) studies revealed that the GNSs prepared through microwave radiation are crumbled with scrolled and entangled nature. Raman spectroscopy and X-ray diffraction (XRD) studies confirmed the graphitic crystalline structure of the synthesized GNSs. The surface composition and functional groups introduced on the surface of GNSs due to microwave radiation are corroborated using X-ray photoelectron spectroscopy (XPS) and Fourier transform Infrared Spectroscopy (FT-IR). Electrochemical characterization studies of GNSs based anode materials showed an enhanced lithium storage capacity and fine cycle performance. The initial discharge capacity of GNS electrode is 580
mAh
g
−1 that decreases to 420
mAh
g
−1 at 50th cycle. Electrochemical impedance spectral analysis reveals that the exchange current density of GNSs increases with the charge–discharge cycle numbers exhibiting the peculiar electrochemical performance. |
| doi_str_mv | 10.1016/j.jpowsour.2011.08.039 |
| format | Article |
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mAh
g
−1, which is significantly higher than the charge/discharge profiles of natural graphite based electrodes. ► Charge-transfer resistance of graphene electrodes decreases with increasing cycle number implying its enhanced electrochemical activity.
Graphene nanosheets (GNSs) are prepared by oxidation and rapid expansion of graphite using microwave radiation. The prepared GNSs are characterized using various characterization tools. Morphological characterization using field emission scanning electron microscopy (FE-SEM) and transmission electron microscopic (TEM) studies revealed that the GNSs prepared through microwave radiation are crumbled with scrolled and entangled nature. Raman spectroscopy and X-ray diffraction (XRD) studies confirmed the graphitic crystalline structure of the synthesized GNSs. The surface composition and functional groups introduced on the surface of GNSs due to microwave radiation are corroborated using X-ray photoelectron spectroscopy (XPS) and Fourier transform Infrared Spectroscopy (FT-IR). Electrochemical characterization studies of GNSs based anode materials showed an enhanced lithium storage capacity and fine cycle performance. The initial discharge capacity of GNS electrode is 580
mAh
g
−1 that decreases to 420
mAh
g
−1 at 50th cycle. Electrochemical impedance spectral analysis reveals that the exchange current density of GNSs increases with the charge–discharge cycle numbers exhibiting the peculiar electrochemical performance.</description><identifier>ISSN: 0378-7753</identifier><identifier>EISSN: 1873-2755</identifier><identifier>DOI: 10.1016/j.jpowsour.2011.08.039</identifier><identifier>CODEN: JPSODZ</identifier><language>eng</language><publisher>Amsterdam: Elsevier B.V</publisher><subject>Anode materials ; Applied sciences ; Direct energy conversion and energy accumulation ; Discharge capacity ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Electrochemical conversion: primary and secondary batteries, fuel cells ; Exact sciences and technology ; GNSS ; Graphene ; Lithium ion battery ; Materials ; Microwave radiation ; Microwaves ; Nanocomposites ; Nanomaterials ; Nanostructure ; X-ray photoelectron spectroscopy ; X-rays</subject><ispartof>Journal of power sources, 2011-12, Vol.196 (23), p.10249-10253</ispartof><rights>2011 Elsevier B.V.</rights><rights>2015 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c374t-cc347f6fc1268d4e78c5340302a7ed91cb1b22f24034a798b96f6c6e4e61e94d3</citedby><cites>FETCH-LOGICAL-c374t-cc347f6fc1268d4e78c5340302a7ed91cb1b22f24034a798b96f6c6e4e61e94d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.jpowsour.2011.08.039$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,45974</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=24623014$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Shanmugharaj, A.M.</creatorcontrib><creatorcontrib>Choi, W.S.</creatorcontrib><creatorcontrib>Lee, C.W.</creatorcontrib><creatorcontrib>Ryu, Sung Hun</creatorcontrib><title>Electrochemical performances of graphene nanosheets prepared through microwave radiation</title><title>Journal of power sources</title><description>► We studied the electrochemical performances of graphene nanosheets prepared through simple, cost effective microwave radiation process. ► Graphene nanosheets based anode materials exhibit stable charge/discharge characteristics of 420
mAh
g
−1, which is significantly higher than the charge/discharge profiles of natural graphite based electrodes. ► Charge-transfer resistance of graphene electrodes decreases with increasing cycle number implying its enhanced electrochemical activity.
Graphene nanosheets (GNSs) are prepared by oxidation and rapid expansion of graphite using microwave radiation. The prepared GNSs are characterized using various characterization tools. Morphological characterization using field emission scanning electron microscopy (FE-SEM) and transmission electron microscopic (TEM) studies revealed that the GNSs prepared through microwave radiation are crumbled with scrolled and entangled nature. Raman spectroscopy and X-ray diffraction (XRD) studies confirmed the graphitic crystalline structure of the synthesized GNSs. The surface composition and functional groups introduced on the surface of GNSs due to microwave radiation are corroborated using X-ray photoelectron spectroscopy (XPS) and Fourier transform Infrared Spectroscopy (FT-IR). Electrochemical characterization studies of GNSs based anode materials showed an enhanced lithium storage capacity and fine cycle performance. The initial discharge capacity of GNS electrode is 580
mAh
g
−1 that decreases to 420
mAh
g
−1 at 50th cycle. Electrochemical impedance spectral analysis reveals that the exchange current density of GNSs increases with the charge–discharge cycle numbers exhibiting the peculiar electrochemical performance.</description><subject>Anode materials</subject><subject>Applied sciences</subject><subject>Direct energy conversion and energy accumulation</subject><subject>Discharge capacity</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Electrochemical conversion: primary and secondary batteries, fuel cells</subject><subject>Exact sciences and technology</subject><subject>GNSS</subject><subject>Graphene</subject><subject>Lithium ion battery</subject><subject>Materials</subject><subject>Microwave radiation</subject><subject>Microwaves</subject><subject>Nanocomposites</subject><subject>Nanomaterials</subject><subject>Nanostructure</subject><subject>X-ray photoelectron spectroscopy</subject><subject>X-rays</subject><issn>0378-7753</issn><issn>1873-2755</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2011</creationdate><recordtype>article</recordtype><recordid>eNqFkMtKxDAUhoMoOF5eQboRV625TdLuFPEGghsFdyGTnkwzdJp60lF8ezOMunV14PD95_IRcsZoxShTl6tqNcbPFDdYccpYReuKimaPzFitRcn1fL5PZlToutR6Lg7JUUorSjOp6Yy83fbgJoyug3Vwti9GQB9xbQcHqYi-WKIdOxigGOwQUwcwpWJEGC1CW0wdxs2yK3IU46f9gAJtG-wU4nBCDrztE5z-1GPyenf7cvNQPj3fP95cP5VOaDmVzgmpvfKOcVW3EnTt5kJSQbnV0DbMLdiCc89zS1rd1ItGeeUUSFAMGtmKY3KxmztifN9Amsw6JAd9bweIm2QaroTgQqtMqh2Zb00JwZsRw9ril2HUbE2alfk1abYmDa1NNpmD5z8rbMqKPGY5If2luVRcUCYzd7XjIP_7EQBNcgGyyDZglmzaGP5b9Q2Nv4-D</recordid><startdate>20111201</startdate><enddate>20111201</enddate><creator>Shanmugharaj, A.M.</creator><creator>Choi, W.S.</creator><creator>Lee, C.W.</creator><creator>Ryu, Sung Hun</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7TB</scope><scope>8FD</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope></search><sort><creationdate>20111201</creationdate><title>Electrochemical performances of graphene nanosheets prepared through microwave radiation</title><author>Shanmugharaj, A.M. ; Choi, W.S. ; Lee, C.W. ; Ryu, Sung Hun</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c374t-cc347f6fc1268d4e78c5340302a7ed91cb1b22f24034a798b96f6c6e4e61e94d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2011</creationdate><topic>Anode materials</topic><topic>Applied sciences</topic><topic>Direct energy conversion and energy accumulation</topic><topic>Discharge capacity</topic><topic>Electrical engineering. Electrical power engineering</topic><topic>Electrical power engineering</topic><topic>Electrochemical conversion: primary and secondary batteries, fuel cells</topic><topic>Exact sciences and technology</topic><topic>GNSS</topic><topic>Graphene</topic><topic>Lithium ion battery</topic><topic>Materials</topic><topic>Microwave radiation</topic><topic>Microwaves</topic><topic>Nanocomposites</topic><topic>Nanomaterials</topic><topic>Nanostructure</topic><topic>X-ray photoelectron spectroscopy</topic><topic>X-rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Shanmugharaj, A.M.</creatorcontrib><creatorcontrib>Choi, W.S.</creatorcontrib><creatorcontrib>Lee, C.W.</creatorcontrib><creatorcontrib>Ryu, Sung Hun</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Journal of power sources</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Shanmugharaj, A.M.</au><au>Choi, W.S.</au><au>Lee, C.W.</au><au>Ryu, Sung Hun</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Electrochemical performances of graphene nanosheets prepared through microwave radiation</atitle><jtitle>Journal of power sources</jtitle><date>2011-12-01</date><risdate>2011</risdate><volume>196</volume><issue>23</issue><spage>10249</spage><epage>10253</epage><pages>10249-10253</pages><issn>0378-7753</issn><eissn>1873-2755</eissn><coden>JPSODZ</coden><abstract>► We studied the electrochemical performances of graphene nanosheets prepared through simple, cost effective microwave radiation process. ► Graphene nanosheets based anode materials exhibit stable charge/discharge characteristics of 420
mAh
g
−1, which is significantly higher than the charge/discharge profiles of natural graphite based electrodes. ► Charge-transfer resistance of graphene electrodes decreases with increasing cycle number implying its enhanced electrochemical activity.
Graphene nanosheets (GNSs) are prepared by oxidation and rapid expansion of graphite using microwave radiation. The prepared GNSs are characterized using various characterization tools. Morphological characterization using field emission scanning electron microscopy (FE-SEM) and transmission electron microscopic (TEM) studies revealed that the GNSs prepared through microwave radiation are crumbled with scrolled and entangled nature. Raman spectroscopy and X-ray diffraction (XRD) studies confirmed the graphitic crystalline structure of the synthesized GNSs. The surface composition and functional groups introduced on the surface of GNSs due to microwave radiation are corroborated using X-ray photoelectron spectroscopy (XPS) and Fourier transform Infrared Spectroscopy (FT-IR). Electrochemical characterization studies of GNSs based anode materials showed an enhanced lithium storage capacity and fine cycle performance. The initial discharge capacity of GNS electrode is 580
mAh
g
−1 that decreases to 420
mAh
g
−1 at 50th cycle. Electrochemical impedance spectral analysis reveals that the exchange current density of GNSs increases with the charge–discharge cycle numbers exhibiting the peculiar electrochemical performance.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jpowsour.2011.08.039</doi><tpages>5</tpages></addata></record> |
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| source | Elsevier ScienceDirect Journals |
| subjects | Anode materials Applied sciences Direct energy conversion and energy accumulation Discharge capacity Electrical engineering. Electrical power engineering Electrical power engineering Electrochemical conversion: primary and secondary batteries, fuel cells Exact sciences and technology GNSS Graphene Lithium ion battery Materials Microwave radiation Microwaves Nanocomposites Nanomaterials Nanostructure X-ray photoelectron spectroscopy X-rays |
| title | Electrochemical performances of graphene nanosheets prepared through microwave radiation |
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