See the published version of this preprint at Nanoscale Research Letters.
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Nano Express
Tang Hui
Shanmugha Arts Science Technology and Research Academy School of Electrical and Electronics Engineering
Corresponding Author
ORCiD: https://orcid.org/0000-0002-5875-3908
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Polyethylene oxide (PEO)-based solid polymer electrolyte (SPE) is considered to have great application prospects in all-solid-state li-ion batteries. However, the application of PEO-based SPEs is hindered by the relatively low ionic conductivity, which strongly depends on its crystallinity and density of grain boundaries. In this work, a simple and effective press rolling method is applied to reduce the crystallinity of PEO-based SPEs for the first time. With the rolled PEO-based SPE, the LiFePO4/SPE/Li all-solid li-ion battery delivers a superior rechargeable specific capacity of 162.6 mAh g-1 with a discharge-charge voltage gap of 60 mV at a current density of 0.2 C with a much lower capacity decay rate. The improvement of electrochemical properties can be attributed to the press rolling method, leading to a doubling conductivity and reduced activation energy compared with that of electrolyte prepared by traditional cast method. The present work provides an effective and easy-to-use grain reforming method for SPE, worthy of future application.
Keywords
solid-state electrolyte, polyethylene oxide, grain boundary, reforming, li-ion battery
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See the published version of this preprint at Nanoscale Research Letters.
This is a preprint, a preliminary version of a manuscript that has not completed peer review at a journal. Research Square does not conduct peer review prior to posting preprints. The posting of a preprint on this server should not be interpreted as an endorsement of its validity or suitability for dissemination as established information or for guiding clinical practice.
Learn more about In Review
Nano Express
Tang Hui
Shanmugha Arts Science Technology and Research Academy School of Electrical and Electronics Engineering
Corresponding Author
ORCiD: https://orcid.org/0000-0002-5875-3908
Badges
Prescreen
This manuscript passed our Prescreen assessment
Complete author information
Appropriate declaration statements
Potential risks to human health
Prescreen
Peer Review Timeline
CURRENT STATUS: Published
View the published article at Nanoscale Research Letters.
Version 1
Posted 17 Mar, 2020
No community comments so far
Editorial decision: Minor revision
On 14 Apr, 2020
Review #3 received
Received 21 Mar, 2020
Review #2 received
Received 21 Mar, 2020
Review #1 received
Received 21 Mar, 2020
Reviewers invited
Invitations sent on 19 Mar, 2020
Reviewer #1 agreed
On 19 Mar, 2020
Reviewer #2 agreed
On 19 Mar, 2020
Reviewer #3 agreed
On 19 Mar, 2020
Editor assigned
On 11 Mar, 2020
First submitted
On 10 Mar, 2020
Submission checks complete
On 10 Mar, 2020
Editor invited
On 10 Mar, 2020
Metrics
Comments: 0
PDF Downloads: ...
HTML Views: ...
Subject Areas
Nanoscience
License:
This work is licensed under a CC BY 4.0 License. Read Full License
View the published article at Nanoscale Research Letters.
Polyethylene oxide (PEO)-based solid polymer electrolyte (SPE) is considered to have great application prospects in all-solid-state li-ion batteries. However, the application of PEO-based SPEs is hindered by the relatively low ionic conductivity, which strongly depends on its crystallinity and density of grain boundaries. In this work, a simple and effective press rolling method is applied to reduce the crystallinity of PEO-based SPEs for the first time. With the rolled PEO-based SPE, the LiFePO4/SPE/Li all-solid li-ion battery delivers a superior rechargeable specific capacity of 162.6 mAh g-1 with a discharge-charge voltage gap of 60 mV at a current density of 0.2 C with a much lower capacity decay rate. The improvement of electrochemical properties can be attributed to the press rolling method, leading to a doubling conductivity and reduced activation energy compared with that of electrolyte prepared by traditional cast method. The present work provides an effective and easy-to-use grain reforming method for SPE, worthy of future application.
Figure 1
Figure 2
Figure 3
Figure 4
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