Low dimensional polymer electrolytes with enhanced Li + conductivities
The structure of two amphiphilic low-dimensional copolymer electrolytes I of similar overall composition but prepared by different synthetic procedures is described. I are copolymers of poly [2,5,8,11,14-pentaoxapentadecamethylene(5-alkyloxy-1,3-phenylene)] (CmO5) and poly[2,-oxatrimethylene(5-alkyl...
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| Veröffentlicht in: | Journal of power sources 2005-08, Vol.146 (1), p.418-422 |
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| creator | Zheng, Y. Liu, J. Liao, Y.-P. Ungar, G. Wright, P.V. |
| description | The structure of two amphiphilic low-dimensional copolymer electrolytes I of similar overall composition but prepared by different synthetic procedures is described. I are copolymers of poly [2,5,8,11,14-pentaoxapentadecamethylene(5-alkyloxy-1,3-phenylene)] (CmO5) and poly[2,-oxatrimethylene(5-alkyloxy-1,3-phenylene)] (CmO1) where the alkyl side chains having m carbons are mixed dodecyl/octadecyl (50/50).
1H NMR shows that the copolymers have only 18 and 13% of CmO5 units in which LiBF
4 ions are separated by Li
+ encapsulation in tetraethoxy segments but molecular modelling suggests that in ionophobic CmO1 units the salt is mostly present as neutral aggregates
decoupled from the polymer. Conductivities of microphase-separated mixtures with salt-bridge amphiphilic polyethers II and III of each system are similar. They have low temperature dependence over the range 20–110
°C at ∼10
−3
S
cm
−1. A conduction mechanism is proposed whereby Li
+ hopping takes place along rows of decoupled aggregates in an essentially
block copolymer structure. Subambient measurements to −10
°C gave a conductivity of 4
×
10
−5
S
cm
−1. |
| doi_str_mv | 10.1016/j.jpowsour.2005.03.125 |
| format | Article |
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1H NMR shows that the copolymers have only 18 and 13% of CmO5 units in which LiBF
4 ions are separated by Li
+ encapsulation in tetraethoxy segments but molecular modelling suggests that in ionophobic CmO1 units the salt is mostly present as neutral aggregates
decoupled from the polymer. Conductivities of microphase-separated mixtures with salt-bridge amphiphilic polyethers II and III of each system are similar. They have low temperature dependence over the range 20–110
°C at ∼10
−3
S
cm
−1. A conduction mechanism is proposed whereby Li
+ hopping takes place along rows of decoupled aggregates in an essentially
block copolymer structure. Subambient measurements to −10
°C gave a conductivity of 4
×
10
−5
S
cm
−1.</description><identifier>ISSN: 0378-7753</identifier><identifier>EISSN: 1873-2755</identifier><identifier>DOI: 10.1016/j.jpowsour.2005.03.125</identifier><identifier>CODEN: JPSODZ</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Applied sciences ; Conductivity ; Copolymer characterisation ; Decoupled salt aggregates ; Direct energy conversion and energy accumulation ; Electrical engineering. Electrical power engineering ; Electrical power engineering ; Electrochemical conversion: primary and secondary batteries, fuel cells ; Energy ; Energy. Thermal use of fuels ; Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc ; Exact sciences and technology ; Fuel cells ; Molecular modelling</subject><ispartof>Journal of power sources, 2005-08, Vol.146 (1), p.418-422</ispartof><rights>2005 Elsevier B.V.</rights><rights>2005 INIST-CNRS</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c320t-eb4298bd217043150d2710879b0f368fe49332f066206209cbcd67a5265fecfc3</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.2005.03.125$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>309,310,314,776,780,785,786,3536,23910,23911,25119,27903,27904,45974</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=17169630$$DView record in Pascal Francis$$Hfree_for_read</backlink></links><search><creatorcontrib>Zheng, Y.</creatorcontrib><creatorcontrib>Liu, J.</creatorcontrib><creatorcontrib>Liao, Y.-P.</creatorcontrib><creatorcontrib>Ungar, G.</creatorcontrib><creatorcontrib>Wright, P.V.</creatorcontrib><title>Low dimensional polymer electrolytes with enhanced Li + conductivities</title><title>Journal of power sources</title><description>The structure of two amphiphilic low-dimensional copolymer electrolytes I of similar overall composition but prepared by different synthetic procedures is described. I are copolymers of poly [2,5,8,11,14-pentaoxapentadecamethylene(5-alkyloxy-1,3-phenylene)] (CmO5) and poly[2,-oxatrimethylene(5-alkyloxy-1,3-phenylene)] (CmO1) where the alkyl side chains having m carbons are mixed dodecyl/octadecyl (50/50).
1H NMR shows that the copolymers have only 18 and 13% of CmO5 units in which LiBF
4 ions are separated by Li
+ encapsulation in tetraethoxy segments but molecular modelling suggests that in ionophobic CmO1 units the salt is mostly present as neutral aggregates
decoupled from the polymer. Conductivities of microphase-separated mixtures with salt-bridge amphiphilic polyethers II and III of each system are similar. They have low temperature dependence over the range 20–110
°C at ∼10
−3
S
cm
−1. A conduction mechanism is proposed whereby Li
+ hopping takes place along rows of decoupled aggregates in an essentially
block copolymer structure. Subambient measurements to −10
°C gave a conductivity of 4
×
10
−5
S
cm
−1.</description><subject>Applied sciences</subject><subject>Conductivity</subject><subject>Copolymer characterisation</subject><subject>Decoupled salt aggregates</subject><subject>Direct energy conversion and energy accumulation</subject><subject>Electrical engineering. Electrical power engineering</subject><subject>Electrical power engineering</subject><subject>Electrochemical conversion: primary and secondary batteries, fuel cells</subject><subject>Energy</subject><subject>Energy. Thermal use of fuels</subject><subject>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</subject><subject>Exact sciences and technology</subject><subject>Fuel cells</subject><subject>Molecular modelling</subject><issn>0378-7753</issn><issn>1873-2755</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2005</creationdate><recordtype>article</recordtype><recordid>eNqFkNFLwzAQxoMoOKf_gvRFX6T1kqxJ-6YMp0LBF30ObXplKW0zk3Zj_70Zm_go3HEcfHcf34-QWwoJBSoe26Td2J23k0sYQJoATyhLz8iMZpLHTKbpOZkBl1ksZcovyZX3LQBQKmFGVoXdRbXpcfDGDmUXbWy379FF2KEeXVhG9NHOjOsIh3U5aKyjwkQPkbZDPenRbM1o0F-Ti6bsPN6c5px8rV4-l29x8fH6vnwuYs0ZjDFWC5ZnVc2C94LTFGomKWQyr6DhImtwkXPOGhCCQahcV7oWskyZSBvUjeZzcn_8u3H2e0I_qt54jV1XDmgnr1gmstAsCMVRqJ313mGjNs70pdsrCuqATbXqF5s6YFPAVcAWDu9ODqXXZde4kNn4v2tJRS44BN3TUYch7tagU14bPPAxLpBTtTX_Wf0A2RWHBA</recordid><startdate>20050826</startdate><enddate>20050826</enddate><creator>Zheng, Y.</creator><creator>Liu, J.</creator><creator>Liao, Y.-P.</creator><creator>Ungar, G.</creator><creator>Wright, P.V.</creator><general>Elsevier B.V</general><general>Elsevier Sequoia</general><scope>IQODW</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20050826</creationdate><title>Low dimensional polymer electrolytes with enhanced Li + conductivities</title><author>Zheng, Y. ; Liu, J. ; Liao, Y.-P. ; Ungar, G. ; Wright, P.V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c320t-eb4298bd217043150d2710879b0f368fe49332f066206209cbcd67a5265fecfc3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2005</creationdate><topic>Applied sciences</topic><topic>Conductivity</topic><topic>Copolymer characterisation</topic><topic>Decoupled salt aggregates</topic><topic>Direct energy conversion and energy accumulation</topic><topic>Electrical engineering. Electrical power engineering</topic><topic>Electrical power engineering</topic><topic>Electrochemical conversion: primary and secondary batteries, fuel cells</topic><topic>Energy</topic><topic>Energy. Thermal use of fuels</topic><topic>Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc</topic><topic>Exact sciences and technology</topic><topic>Fuel cells</topic><topic>Molecular modelling</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zheng, Y.</creatorcontrib><creatorcontrib>Liu, J.</creatorcontrib><creatorcontrib>Liao, Y.-P.</creatorcontrib><creatorcontrib>Ungar, G.</creatorcontrib><creatorcontrib>Wright, P.V.</creatorcontrib><collection>Pascal-Francis</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>Technology Research Database</collection><collection>Materials Research Database</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>Zheng, Y.</au><au>Liu, J.</au><au>Liao, Y.-P.</au><au>Ungar, G.</au><au>Wright, P.V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Low dimensional polymer electrolytes with enhanced Li + conductivities</atitle><jtitle>Journal of power sources</jtitle><date>2005-08-26</date><risdate>2005</risdate><volume>146</volume><issue>1</issue><spage>418</spage><epage>422</epage><pages>418-422</pages><issn>0378-7753</issn><eissn>1873-2755</eissn><coden>JPSODZ</coden><abstract>The structure of two amphiphilic low-dimensional copolymer electrolytes I of similar overall composition but prepared by different synthetic procedures is described. I are copolymers of poly [2,5,8,11,14-pentaoxapentadecamethylene(5-alkyloxy-1,3-phenylene)] (CmO5) and poly[2,-oxatrimethylene(5-alkyloxy-1,3-phenylene)] (CmO1) where the alkyl side chains having m carbons are mixed dodecyl/octadecyl (50/50).
1H NMR shows that the copolymers have only 18 and 13% of CmO5 units in which LiBF
4 ions are separated by Li
+ encapsulation in tetraethoxy segments but molecular modelling suggests that in ionophobic CmO1 units the salt is mostly present as neutral aggregates
decoupled from the polymer. Conductivities of microphase-separated mixtures with salt-bridge amphiphilic polyethers II and III of each system are similar. They have low temperature dependence over the range 20–110
°C at ∼10
−3
S
cm
−1. A conduction mechanism is proposed whereby Li
+ hopping takes place along rows of decoupled aggregates in an essentially
block copolymer structure. Subambient measurements to −10
°C gave a conductivity of 4
×
10
−5
S
cm
−1.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.jpowsour.2005.03.125</doi><tpages>5</tpages></addata></record> |
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| subjects | Applied sciences Conductivity Copolymer characterisation Decoupled salt aggregates Direct energy conversion and energy accumulation Electrical engineering. Electrical power engineering Electrical power engineering Electrochemical conversion: primary and secondary batteries, fuel cells Energy Energy. Thermal use of fuels Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc Exact sciences and technology Fuel cells Molecular modelling |
| title | Low dimensional polymer electrolytes with enhanced Li + conductivities |
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