Lithium doped N,N-dimethyl pyrrolidinium tetrafluoroborate organic ionic plastic crystal electrolytes for solid state lithium batteries Jin, Liyu, Howlett, Patrick, Efthimiadis, Jim, Kar, Mega, MacFarlane, Doug and Forsyth, Maria 2011, Lithium doped N,N-dimethyl pyrrolidinium tetrafluoroborate organic ionic plastic crystal electrolytes for solid state lithium batteries, Journal of materials chemistry, vol. 21, no. 27, pp. 10171-10178. Attached Files Name Description MIMEType Size Downloads howlett-lithiumdope-2011.pdf Published version application/pdf 458.61KB 527 Title Lithium doped N,N-dimethyl pyrrolidinium tetrafluoroborate organic ionic plastic crystal electrolytes for solid state lithium batteries Author(s) Jin, Liyu Howlett, Patrick orcid.org/0000-0002-2151-2932 Efthimiadis, Jim Kar, Mega MacFarlane, Doug Forsyth, Maria orcid.org/0000-0002-4273-8105 Journal name Journal of materials chemistry Volume number 21 Issue number 27 Start page 10171 End page 10178 Total pages 8 Publisher Royal Society of Chemistry Place of publication Cambridge, U. K. Publication date 2011 ISSN 0959-9428 1364-5501 Summary The organic ionic plastic crystal material N,N-dimethyl pyrrolidinium tetrafluoroborate ([C1mpyr][BF4]) has been mixed with LiBF4 from 0 to 8 wt% and shown to exhibit enhanced ionic conductivity, especially in the higher temperature plastic crystal phases (phases II and I). The materials retain their solid state well above 100 °C with the melt not being observed up to 300 °C. Interestingly the conductivity enhancement is highest with the lowest level of LiBF4 addition in phase II, but then the order of enhancement is reversed in phase I. In all cases, a conductivity drop is observed at the II → I phase transition (105 °C) which is associated with increased order in the pure matrix, as previously reported, although the conductivity drop is least for the highest LiBF4 amount (8 wt%). The 8 wt% sample displays different conductivity behaviours compared to the lower LiBF4 concentrations, with a sharp increase above 50 °C, which is apparently not related to the formation of an amorphous phase, based on XRD data up to 120 °C. Symmetric cells, Li/OIPC/Li, were prepared and cycled at 50 °C and showed evidence of significant preconditioning with continued cycling, leading to a lower over-potential and a concomitant decrease in the cell resistivity as measured by EIS. An SEM investigation of the Li/OIPC interfaces before and after cycling suggested significant grain refinement was responsible for the decrease in cell resistance upon cycling, possibly as a result of an increased grain boundary phase. Language eng Field of Research 030604 Electrochemistry Socio Economic Objective 850602 Energy Storage (excl. Hydrogen) HERDC Research category C1 Refereed article in a scholarly journal Copyright notice ©2010, The Royal Society of Chemistry. Free to Read? Yes Persistent URL http://hdl.handle.net/10536/DRO/DU:30040372 Document type: Journal Article Collections: Centre for Material and Fibre Innovation Open Access Collection GTP Research Related Links Link Description Connect to published version (restricted access) Go to link with your DU access privileges     Unless expressly stated otherwise, the copyright for items in DRO is owned by the author, with all rights reserved. Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au. Versions Version Filter Type Mon, 05 Dec 2011, 12:33:15 EST Tue, 06 Dec 2011, 10:06:47 EST Tue, 06 Dec 2011, 10:10:50 EST Mon, 17 Jun 2013, 17:08:15 EST Thu, 09 Jan 2014, 10:23:00 EST Fri, 13 Jun 2014, 11:53:52 EST Wed, 21 Oct 2015, 17:29:17 EST Tue, 05 Dec 2017, 12:27:03 EST Fri, 07 Sep 2018, 15:36:11 EST Filtered Full Citation counts:   Cited 58 times in TR Web of Science Cited 58 times in Scopus Search Google Scholar Access Statistics: 914 Abstract Views, 532 File Downloads  -  Detailed Statistics Created: Mon, 05 Dec 2011, 12:33:15 EST