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Correlating Electrode–Electrolyte Interface and Battery Performance in Hybrid Solid Polymer Electrolyte‐Based Lithium Metal Batteries
Author(s) -
Pan Qiwei,
Barbash Dmitri,
Smith Derrick M.,
Qi Hao,
Gleeson Sarah E.,
Li Christopher Y.
Publication year - 2017
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201701231
Subject(s) - materials science , electrolyte , lithium metal , battery (electricity) , lithium (medication) , polymer , ionic conductivity , cathode , fast ion conductor , electrode , dendrite (mathematics) , lithium battery , nanotechnology , chemical engineering , ionic bonding , composite material , ion , chemistry , organic chemistry , power (physics) , medicine , physics , geometry , mathematics , quantum mechanics , engineering , endocrinology
Solid polymer electrolytes (SPEs) are desirable in lithium metal batteries (LMBs) since they are nonflammable and show excellent lithium dendrite growth resistance. However, fabricating high performance polymer LMBs is still a grand challenge because of the complex battery system. In this work, a series of tailor‐designed hybrid SPEs are used to prepare LMBs with a LiFePO 4 ‐based cathode. High performance LMBs with both excellent rate capability and long cycle life are obtained at 60 and 90 °C. The well‐controlled network structure in this series of hybrid SPEs offers a model system to study the relationship between the SPE properties and the LMB performance. It is shown that the cycle life of the polymer LMBs is closely correlated with the SPE–Li interface ionic conductivity, underscoring the importance of the solid electrolyte interface in LMB operation. LMB performance is further correlated with the molecular network structure. It is anticipated that results from this study will shed light on designing SPEs for high performance LMB applications.