Nanoscale Borate Coating Network Stabilized Iron Oxide Anode for High-Energy-Density Bipolar Lithium-Ion Batteries.

Small

State Key Laboratory of High Performance Ceramics and Superfine Microstructure, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 200050, P. R. China.

Published: April 2023

High-capacity metal oxides based on non-toxic earth-abundant elements offer unique opportunities as advanced anodes for lithium-ion batteries (LIBs). But they often suffer from large volumetric expansion, particle pulverization, extensive side reactions, and fast degradations during cycling. Here, an easy synthesis method is reported to construct amorphous borate coating network, which stabilizes conversion-type iron oxide anode for the high-energy-density semi-solid-state bipolar LIBs. The nano-borate coated iron oxide anode has high tap density (1.6 g cm ), high capacity (710 mAh g between 0.5 - 3.0 V, vs Li/Li ), good rate performance (200 mAh g at 50 C), and excellent cycling stability (≈100% capacity resention over 1,000 cycles at 5 A g ). When paired with high-voltage cathode LiCoO , it enables Cu current collector-free pouch-type classic and bipolar full cells with high voltage (7.6 V with two stack layers), achieving high energy density (≈350 Wh kg ), outstanding power density (≈6,700 W kg ), and extended cycle life (75% capacity retention after 2,000 cycles at 2 C), superior to the state-of-the-art high-power LIBs using Li Ti O anode. The design and methodology of the nanoscale polyanion-like coating can be applied to other metal oxides electrode materials, as well as other electrochemical materials and devices.

Download full-text PDF

Source
http://dx.doi.org/10.1002/smll.202207074DOI Listing

Publication Analysis

Top Keywords

iron oxide
12
oxide anode
12
borate coating
8
coating network
8
anode high-energy-density
8
lithium-ion batteries
8
metal oxides
8
nanoscale borate
4
network stabilized
4
stabilized iron
4

Similar Publications

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!