Issue 4, 2019

Direct electrophoretic deposition of an ultra-strong separator on an anode in a surfactant-free colloidal system for lithium ion batteries

Abstract

A hierarchically laminated nanostructured PVdF–HFP membrane is deposited directly on a carbon anode through efficient, scalable electrophoretic deposition (EPD) in a surfactant-free colloidal system. Lithium ion batteries based on the separator–anode configuration have a well-structured microscopic interface with uniform, reinforced separator/electrode contact. The resulting separator enables a high ionic conductivity of 8.1 × 10−4 S cm−1, and exhibits a low thermal shrinkage of 3% after annealing at 160 °C for 5 h, a high isotropic mechanical strength (∼33 MPa) and an ultra-high ductility (∼450%). The battery with the separator–anode configuration delivers a discharge capacity of 370 mA h g−1 (99.5% of the theoretical capacity) at 0.1C, an excellent capacity retention of ∼100% after 300 cycles, and a pronounced rate capability of 270 mA h g−1 at 1C. This work opens up the opportunity to realize both reliable and high-capacity material platforms for next-generation lithium ion batteries.

Graphical abstract: Direct electrophoretic deposition of an ultra-strong separator on an anode in a surfactant-free colloidal system for lithium ion batteries

Supplementary files

Article information

Article type
Communication
Submitted
18 Sep 2018
Accepted
29 Nov 2018
First published
29 Nov 2018

J. Mater. Chem. A, 2019,7, 1410-1417

Direct electrophoretic deposition of an ultra-strong separator on an anode in a surfactant-free colloidal system for lithium ion batteries

Y. Han, L. Ye, B. Boateng, Q. Sun, C. Zhen, N. Chen, X. Shi, J. H. Dickerson, X. Li and W. He, J. Mater. Chem. A, 2019, 7, 1410 DOI: 10.1039/C8TA09092K

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