Separator-free and concentrated LiNO3 electrolyte cells enable uniform lithium electrodeposition
Imaging of lithium electrodepositions revealed that in the absence of a compressed porous separator, achieved via a plastic washer, dendrite-free lithium was deposited from glyme solutions of 1 M LiNO3. When the 1 M LiNO3 in glyme was coupled with a 1 M LiFSI salt, high coulombic efficiencies were a...
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| Veröffentlicht in: | Journal of materials chemistry. A, Materials for energy and sustainability Materials for energy and sustainability, 2020-02, Vol.8 (7), p.3999-4006 |
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| container_title | Journal of materials chemistry. A, Materials for energy and sustainability |
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| creator | Rodriguez, Rodrigo Edison, Ruth A. Stephens, Ryan M. Sun, Ho-Hyun Heller, Adam Mullins, C. Buddie |
| description | Imaging of lithium electrodepositions revealed that in the absence of a compressed porous separator, achieved via a plastic washer, dendrite-free lithium was deposited from glyme solutions of 1 M LiNO3. When the 1 M LiNO3 in glyme was coupled with a 1 M LiFSI salt, high coulombic efficiencies were also attainable in both Li|Cu and anode-free LFP|Cu cells. However, dendrite resurgence was observed in cycled lithium coin cell electrodes when a porous separator was utilized. This was attributed to the restriction of Li+ flux to the electrode surface induced by the porous and tortuous structure of the polymer separator. At these pores, localized current densities, which exceeded the applied current density, and a non-uniform Li+ flux resulted in dendritic lithium growth. Replacement of the separator by a washer normalized the current distribution and provided for non-dendritic lithium deposits in coin cells. |
| doi_str_mv | 10.1039/c9ta10929c |
| format | Article |
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Buddie</creator><creatorcontrib>Rodriguez, Rodrigo ; Edison, Ruth A. ; Stephens, Ryan M. ; Sun, Ho-Hyun ; Heller, Adam ; Mullins, C. Buddie</creatorcontrib><description>Imaging of lithium electrodepositions revealed that in the absence of a compressed porous separator, achieved via a plastic washer, dendrite-free lithium was deposited from glyme solutions of 1 M LiNO3. When the 1 M LiNO3 in glyme was coupled with a 1 M LiFSI salt, high coulombic efficiencies were also attainable in both Li|Cu and anode-free LFP|Cu cells. However, dendrite resurgence was observed in cycled lithium coin cell electrodes when a porous separator was utilized. This was attributed to the restriction of Li+ flux to the electrode surface induced by the porous and tortuous structure of the polymer separator. At these pores, localized current densities, which exceeded the applied current density, and a non-uniform Li+ flux resulted in dendritic lithium growth. 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At these pores, localized current densities, which exceeded the applied current density, and a non-uniform Li+ flux resulted in dendritic lithium growth. Replacement of the separator by a washer normalized the current distribution and provided for non-dendritic lithium deposits in coin cells.</description><subject>Chemistry</subject><subject>Chemistry, Physical</subject><subject>Current density</subject><subject>Current distribution</subject><subject>Dendritic structure</subject><subject>Depth profiling</subject><subject>Electrodes</subject><subject>Electrolytic cells</subject><subject>Energy & Fuels</subject><subject>Lithium</subject><subject>Materials Science</subject><subject>Materials Science, Multidisciplinary</subject><subject>Physical Sciences</subject><subject>Polymers</subject><subject>Science & Technology</subject><subject>Separators</subject><subject>Technology</subject><issn>2050-7488</issn><issn>2050-7496</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2020</creationdate><recordtype>article</recordtype><sourceid>AOWDO</sourceid><recordid>eNqNkE1LxDAQhosouKx78RcEPEo1322OUvyCxT2o55qkE83STWqaIv57K6uencsMw_POyztFcUrwBcFMXVqVNcGKKntQLCgWuKy4kod_c10fF6tx3OK5aoylUovi5REGnXSOqXQJAOnQIRuDhZDnLXRo7R82DEEPNqfYf2ZAFvp-RBC06QFNwbuYdqj3-c1Pu1-wgyGOPvsYToojp_sRVj99WTzfXD81d-V6c3vfXK3LV0pxLitqlFXc2VoRa7ngBrSglFedMJQbC0pqzJyRjjpdEaINJk53WAvVKWkFWxZn-7tDiu8TjLndximF2bKlTEiJJcNqpuo99QEmutF6mKO2Q_I7nT7b-S-CEsZnGmMuG5_1d4QmTiHP0vP_S9kXxaR5RA</recordid><startdate>20200221</startdate><enddate>20200221</enddate><creator>Rodriguez, Rodrigo</creator><creator>Edison, Ruth A.</creator><creator>Stephens, Ryan M.</creator><creator>Sun, Ho-Hyun</creator><creator>Heller, Adam</creator><creator>Mullins, C. 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At these pores, localized current densities, which exceeded the applied current density, and a non-uniform Li+ flux resulted in dendritic lithium growth. Replacement of the separator by a washer normalized the current distribution and provided for non-dendritic lithium deposits in coin cells.</abstract><cop>CAMBRIDGE</cop><pub>Royal Soc Chemistry</pub><doi>10.1039/c9ta10929c</doi><tpages>8</tpages></addata></record> |
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| source | Royal Society Of Chemistry Journals; Web of Science - Science Citation Index Expanded - 2020<img src="https://exlibris-pub.s3.amazonaws.com/fromwos-v2.jpg" /> |
| subjects | Chemistry Chemistry, Physical Current density Current distribution Dendritic structure Depth profiling Electrodes Electrolytic cells Energy & Fuels Lithium Materials Science Materials Science, Multidisciplinary Physical Sciences Polymers Science & Technology Separators Technology |
| title | Separator-free and concentrated LiNO3 electrolyte cells enable uniform lithium electrodeposition |
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