Hybrid Polymer Electrolyte Encased Cathode Particles Interface‐Based Core–Shell Structure for High‐Performance Room Temperature All‐Solid‐State Batteries
Abstract
A smooth interfacial contact between electrode and electrolyte, alleviation of dendrite formation, low internal resistance, and preparation of thin electrolyte (7La3Zr2O12 (LLZO)‐based solid‐state batteries (SSBs). This paper develops a unique strategy to reduce interfacial resistance by designing an interface‐based core–shell structure via direct integration of Al‐LLZO ceramic nanofibers incorporated poly(vinylidene fluoride)/LiTFSI on the surface of a porous cathode electrode (HPEIC). This yields an ultrathin solid polymer electrolyte with a thickness of 7 µm. The integrated HPEIC/Li SSB with LiFePO4/C exhibits an initial specific capacity of 166 mAh g−1 at 0.1 C and 159 mAh g−1 with capacity retention of 100% after 120 cycles at 0.5 C (25 °C). The HPEIC/Li SSB with LiNi0.8Mn0.1Co0.1O2 cathode delivers a good discharge capacity of 134 mAh g−1 after 120 cycles at 0.5 C. The rational design of interface‐based core–shell structure outperforms the conventional assembly of solid‐state cells using free‐standing solid electrolytes in specific capacity, internal resistance, and rate performance. The proposed strategy is simple, cost‐effective, robust, and scalable manufacturing, which is essential for the practical applicability of SSBs.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 29, 2022
- Source ID
- 10.1002/aenm.202202981
Entities
People
- Abhilash Karuthedath Parameswaran
- Haoqing Hou
- Sagar A. Joshi
- Seema Agarwal
- Sivaraj Pazhaniswamy
Organizations
- Intelligence Community Postdoctoral Research Fellowship Program
- Jiangxi Normal University
- University of Bayreuth
- University of Chemistry and Technology