Nacre‐Inspired Composite Electrolytes for Load‐Bearing Solid‐State Lithium‐Metal Batteries
Abstract
Solid‐state lithium‐metal batteries with solid electrolytes are promising for next‐generation energy‐storage devices. However, it remains challenging to develop solid electrolytes that are both mechanically robust and strong against external mechanical load, due to the brittleness of ceramic electrolytes and the softness of polymer electrolytes. Herein, a nacre‐inspired design of ceramic/polymer solid composite electrolytes with a “brick‐and‐mortar” microstructure is proposed. The nacre‐like ceramic/polymer electrolyte (NCPE) simultaneously possesses a much higher fracture strain (1.1%) than pure ceramic electrolytes (0.13%) and a much larger ultimate flexural modulus (7.8 GPa) than pure polymer electrolytes (20 MPa). The electrochemical performance of NCPE is also much better than pure ceramic or polymer electrolytes, especially under mechanical load. A 5 × 5 cm2 pouch cell with LAGP/poly(ether‐acrylate) NCPE exhibits stable cycling with a capacity retention of 95.6% over 100 cycles at room temperature, even undergoes a large point load of 10 N. In contrast, cells based on pure ceramic and pure polymer electrolyte show poor cycle life. The NCPE provides a new design for solid composite electrolyte and opens up new possibilities for future solid‐state lithium‐metal batteries and structural energy storage.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Nov 29, 2019
- Source ID
- 10.1002/adma.201905517
Entities
People
- Aijun Li
- Cheng Qian
- Hanrui Zhang
- James Borovilas
- Karim Zaghib
- Kristin Myers
- Lei Shi
- Martin Dontigny
- Peiyu Wang
- Wenlong Huang
- Xi Chen
- Xiangbiao Liao
- Xiuyun Chuan
- Yuan Yang
- Zeyuan Li
- Zhenxuan Fu
Organizations
- Air Force Office of Scientific Research
- China Scholarship Council
- Columbia University
- Institut de recherche d'Hydro-Québec
- National Natural Science Foundation of China
- National Science Foundation
- Peking University