Multilayered, Bipolar, All-Solid-State Battery Enabled by a Perovskite-Based Biphasic Solid Electrolyte
- Authors
- Shin, Hyun-Seop; Ryu, Won-Gyue; Park, Min-Sik; Jung, Kyu-Nam; Kim, Hansung; Lee, Jong-Won
- Issue Date
- Sep-2018
- Publisher
- WILEY-V C H VERLAG GMBH
- Keywords
- electrochemistry; perovskite phases; polymers; organic-inorganic hybrid composites; solid-state structures
- Citation
- CHEMSUSCHEM, v.11, no.18, pp.3184 - 3190
- Indexed
- SCIE
SCOPUS
- Journal Title
- CHEMSUSCHEM
- Volume
- 11
- Number
- 18
- Start Page
- 3184
- End Page
- 3190
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/190949
- DOI
- 10.1002/cssc.201801399
- ISSN
- 1864-5631
- Abstract
- The use of solid electrolytes provides a technical solution to address the safety issues of lithium-ion batteries and enables a bipolar design of high-voltage and high-energy battery modules. The bipolar design avoids unnecessary components and parts for packaging and electrical connection; therefore, it facilitates an increase in the volumetric energy density of the battery, while enabling easy build-up of total output voltage. Herein, the design and construction of a multilayered, bipolar-type, all-solid-state battery (ASSB) from a biphasic solid electrolyte (BSE) based on inorganic Li0.29La0.57TiO3 perovskite and poly(ethylene oxide) (PEO) are reported. A flexible and freestanding BSE membrane exhibits high Li+ conductivity of about 1.2x10(-4)Scm(-1), and shows enhanced electrochemical/thermal stability, in comparison to a PEO-only solid electrolyte. A single-layered ASSB assembled with a BSE shows promising electrochemical performance, as evidenced by a high reversible capacity of about 123mAhg(-1) and excellent cycling stability over 100cycles. Furthermore, a proof-of-concept bipolar ASSB comprising three unit cells connected in series is constructed by using the BSE membrane and Al/Cu-cladded bipolar plates. The bipolar ASSB shows high thermal stability and operates reversibly without any internal short circuit or current leakage during charge-discharge cycles; this demonstrates that BSEs provide a promising approach to the design and fabrication of bipolar ASSBs with improved safety and high energy density.
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