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

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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

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Publication details

The article was received on 18 Sep 2018, accepted on 29 Nov 2018 and first published on 29 Nov 2018


Article type: Communication
DOI: 10.1039/C8TA09092K
Citation: J. Mater. Chem. A, 2019, Advance Article
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    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, Advance Article , DOI: 10.1039/C8TA09092K

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