Polymer-Templated LiFePO4/C Nanonetworks as High-Performance Cathode Materials for Lithium-Ion Batteries

Fischer, Michael G. and Hua, Xiao and Wilts, Bodo D. and Castillo-Martínez, Elizabeth and Steiner, Ullrich (2018) Polymer-Templated LiFePO4/C Nanonetworks as High-Performance Cathode Materials for Lithium-Ion Batteries. ACS Applied Materials & Interfaces, 10 (2). pp. 1646-1653. ISSN 1944-8252

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Abstract

Lithium iron phosphate (LFP) is currently one of the main cathode materials used in lithium-ion batteries due to its safety, relatively low cost, and exceptional cycle life. To overcome its poor ionic and electrical conductivities, LFP is often nanostructured, and its surface is coated with conductive carbon (LFP/C). Here, we demonstrate a sol–gel based synthesis procedure that utilizes a block copolymer (BCP) as a templating agent and a homopolymer as an additional carbon source. The high-molecular-weight BCP produces self-assembled aggregates with the precursor-sol on the 10 nm scale, stabilizing the LFP structure during crystallization at high temperatures. This results in a LFP nanonetwork consisting of interconnected ∼10 nm-sized particles covered by a uniform carbon coating that displays a high rate performance and an excellent cycle life. Our “one-pot” method is facile and scalable for use in established battery production methodologies.

Item Type:
Journal Article
Journal or Publication Title:
ACS Applied Materials & Interfaces
Uncontrolled Keywords:
/dk/atira/pure/subjectarea/asjc/2500
Subjects:
ID Code:
171418
Deposited By:
Deposited On:
07 Jun 2022 14:10
Refereed?:
Yes
Published?:
Published
Last Modified:
12 Dec 2022 12:20