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A 3D-printed ultra-high Se loading cathode for high energy density quasi-solid-state Li–Se batteries

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Abstract

Quasi-solid-state lithium–selenium batteries (QSSLSEBs) assembled with gel polymer electrolytes (GPEs) are a promising class of next-generation rechargeable batteries due to their safety, high energy density and shuttle-free charging/discharging process. Nevertheless, both poor Li+ transport in thick electrodes and Li dendrite growth limit the improvements of the current density as well as Se loading, resulting in low energy/power densities. Herein, we proposed to combine a 3D-printed carbon nanotube (CNT) interlayer to protect the Li anode with a 3D-printed Se cathode (named 3DPSe) filled with GPEs in high Se loading cathodes to achieve ultra-high energy/power-density QSSLSEBs. Benefitting from the 3D-printed CNT interlayer in suppressing Li dendrite growth, the Li–Li symmetric cell stably runs for 400 h (3 mA cm−2; 3 mA h cm−2), which is almost one order of magnitude longer than the interlayer-free cell. Moreover, 3DPSe acts as a host for GPE impregnation to fabricate interconnect Li+ transport channels in the thick Se cathode, enabling fast Li+ transport. Accordingly, the QSSLSEB assembled with an ultra-high Se loading of 20 mg cm−2 delivers the highest reported areal capacity of 12.99 mA h cm−2 at 3 mA cm−2. This work is expected to open up promising opportunities to develop other high-energy/power-density solid-state lithium batteries (SSLBs).

Graphical abstract: A 3D-printed ultra-high Se loading cathode for high energy density quasi-solid-state Li–Se batteries

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Publication details

The article was received on 26 Sep 2019, accepted on 15 Nov 2019 and first published on 16 Nov 2019


Article type: Paper
DOI: 10.1039/C9TA10623E
J. Mater. Chem. A, 2020, Advance Article

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    A 3D-printed ultra-high Se loading cathode for high energy density quasi-solid-state Li–Se batteries

    X. Gao, X. Yang, S. Wang, Q. Sun, C. Zhao, X. Li, J. Liang, M. Zheng, Y. Zhao, J. Wang, M. Li, R. Li, T. Sham and X. Sun, J. Mater. Chem. A, 2020, Advance Article , DOI: 10.1039/C9TA10623E

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