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BCl3 modified tris(dichloromethylsilylethyl)borane as a precursor for SiBCN ceramics applied in lithium-ion battery anodes

Chen, Qingqing ; Li, Daxin ; Yang, Zhihua ; Jia, Dechang ; Zhou, Yu ; Riedel, Ralf (2021):
BCl3 modified tris(dichloromethylsilylethyl)borane as a precursor for SiBCN ceramics applied in lithium-ion battery anodes.
In: Ceramics International, 47 (16), pp. 22839-22853. Elsevier, ISSN 0272-8842, e-ISSN 1873-3956,
DOI: 10.1016/j.ceramint.2021.04.303,
[Article]

Abstract

Tris(dichloromethylsilylethyl)borane is a compound containing a B-C bond and Cl and H elements. Herein, we propose a novel method to synthesize polyborosilazanes using tris(dichloromethylsilylethyl)borane and boron trichlorosilane as boron sources and hexamethyldisilazane as a nitrogen source. The microstructure and chemical composition of the as-synthesized polyborosilazanes and as-annealed SiBCN ceramics were investigated using Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, Raman spectroscopy, scanning electron microscope, and transmission electron microscope methods. The organic precursors were converted entirely into inorganic ceramics at 800 degrees C, and the ceramic yield of the polyborosilazanes was 88% at 1000 degrees C. SiBCN ceramics with irregular shapes contained chemical bonds of B-N, Si-N, and Si-C at 1500 degrees C and retained an amorphous structure below 1600 degrees C. After the first cycle, the fabricated SiBCN ceramic anodes exhibited a reversible capacity of 261.3 mA h/g, which was 2.6 times that reported in the literature (101 mA h/g). The discharge capacity decreased to 157.6 mA h/g after 30 cycles. The satisfactory electrochemical performance of the resulting SiBCN ceramic anodes can be attributed to the formation of conductive carbon species favoring the transport properties of lithium ion.

Item Type: Article
Erschienen: 2021
Creators: Chen, Qingqing ; Li, Daxin ; Yang, Zhihua ; Jia, Dechang ; Zhou, Yu ; Riedel, Ralf
Title: BCl3 modified tris(dichloromethylsilylethyl)borane as a precursor for SiBCN ceramics applied in lithium-ion battery anodes
Language: English
Abstract:

Tris(dichloromethylsilylethyl)borane is a compound containing a B-C bond and Cl and H elements. Herein, we propose a novel method to synthesize polyborosilazanes using tris(dichloromethylsilylethyl)borane and boron trichlorosilane as boron sources and hexamethyldisilazane as a nitrogen source. The microstructure and chemical composition of the as-synthesized polyborosilazanes and as-annealed SiBCN ceramics were investigated using Fourier transform infrared spectroscopy, nuclear magnetic resonance spectroscopy, Raman spectroscopy, scanning electron microscope, and transmission electron microscope methods. The organic precursors were converted entirely into inorganic ceramics at 800 degrees C, and the ceramic yield of the polyborosilazanes was 88% at 1000 degrees C. SiBCN ceramics with irregular shapes contained chemical bonds of B-N, Si-N, and Si-C at 1500 degrees C and retained an amorphous structure below 1600 degrees C. After the first cycle, the fabricated SiBCN ceramic anodes exhibited a reversible capacity of 261.3 mA h/g, which was 2.6 times that reported in the literature (101 mA h/g). The discharge capacity decreased to 157.6 mA h/g after 30 cycles. The satisfactory electrochemical performance of the resulting SiBCN ceramic anodes can be attributed to the formation of conductive carbon species favoring the transport properties of lithium ion.

Journal or Publication Title: Ceramics International
Journal volume: 47
Number: 16
Publisher: Elsevier
Uncontrolled Keywords: SiBCN, Soluble polyborosilazanes, Electrochemical performance POLYMER-DERIVED CERAMICS, C-N CERAMICS, HIGH-TEMPERATURE STABILITY, SOLID-STATE NMR, BORON CONTENT, CONVERSION, PYROLYSIS, COMPOSITE, CAPACITY, ROUTE
Divisions: 11 Department of Materials and Earth Sciences
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences > Material Science > Dispersive Solids
Date Deposited: 04 Aug 2021 05:05
DOI: 10.1016/j.ceramint.2021.04.303
Additional Information:

National Natural Science Foundation of China (NSFC), Grant Numbers 52002092, 51832002. National Key Research and Development Program of China, Grant Number 2017YFB0310400. China Postdoctoral Science Foundation, Grant Numbers BX20190095, 2019M660072.

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