WO2022236984A1 - 均匀改性的硅基锂离子电池负极材料及其制备方法和应用 - Google Patents
均匀改性的硅基锂离子电池负极材料及其制备方法和应用 Download PDFInfo
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Abstract
Description
Claims (9)
- 一种均匀改性的硅基锂离子电池负极材料,其特征在于,所述硅基锂离子电池负极材料的结构为碳原子以原子尺度均匀弥散分布在氧化亚硅基质中;在硅基锂离子电池负极材料的聚焦离子束-透射电镜FIB-TEM测试中,颗粒切面的能谱面扫显示颗粒内部碳元素、氧元素、硅元素均匀分布;所述硅基锂离子电池负极材料颗粒的平均粒径D 50为1nm-100μm,比表面积为0.5m 2/g-40m 2/g;所述碳原子的质量占氧化亚硅基质质量的0.1%-40%。
- 根据权利要求1所述的硅基锂离子电池负极材料,其特征在于,所述硅基锂离子电池负极材料的外部还具有碳包覆层;所述碳包覆层的质量占氧化亚硅基质质量的0-20%。
- 根据权利要求2所述的硅基锂离子电池负极材料,其特征在于,所述碳原子的质量占氧化亚硅基质质量的0.5%-10%;所述碳包覆层的质量占氧化亚硅基质质量的0-10%。
- 一种上述权利要求1-3任一所述的硅基锂离子电池负极材料的制备方法,其特征在于,所述制备方法包括:在保护气氛下,将含碳气源、预先加热好的硅和二氧化硅的混合蒸气进行气相混合反应1-24小时,得到碳原子以原子尺度均匀弥散分布在氧化亚硅基质中的物料;将所述物料冷却至室温并出料粉碎筛分,得到碳原子以原子尺度均匀弥散分布在氧化亚硅基质中的颗粒,即为所述硅基锂离子电池负极材料。
- 根据权利要求4所述的制备方法,其特征在于,所述含碳气源包括:甲烷,丙烷,丁烷,乙炔,乙烯,丙烯,丁二烯或一氧化碳中的一种或多种。
- 根据权利要求4所述的制备方法,其特征在于,在将所述物料冷却至室温并出料粉碎筛分之后,所述制备方法还包括:对所述筛分后的物料进行碳包覆,分级后即得所述负极材料。
- 根据权利要求6所述的制备方法,其特征在于,所述碳包覆包括:气相包覆、液相包覆、固相包覆中的至少一种。
- 一种包括上述权利要求1-3任一所述的硅基锂离子电池负极材料的负极片。
- 一种包括上述权利要求8所述的负极片的锂电池。
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JP2023567260A JP2024518372A (ja) | 2021-05-13 | 2021-08-10 | 均一に改質されたケイ素系リチウムイオン電池用負極材料及びその調製方法と応用 |
EP21941553.6A EP4340066A1 (en) | 2021-05-13 | 2021-08-10 | Uniformly modified cathode material for silicon-based lithium ion battery, preparation method therefor and application thereof |
KR1020237040477A KR20230175296A (ko) | 2021-05-13 | 2021-08-10 | 균일하게 개질된 실리콘계 리튬 이온 전지 음극재 및 이의 제조 방법과 응용 |
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CN116918099A (zh) * | 2022-03-29 | 2023-10-20 | 宁德新能源科技有限公司 | 负极极片、用于电化学装置中的负极极片、电化学装置及电子设备 |
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CN108807862A (zh) * | 2017-05-03 | 2018-11-13 | 溧阳天目先导电池材料科技有限公司 | 一种硅基复合材料及其制备方法、负极材料和锂电池 |
CN110660984A (zh) * | 2019-10-15 | 2020-01-07 | 溧阳天目先导电池材料科技有限公司 | 一种纳米硅碳复合材料及其制备方法和应用 |
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CN103280581A (zh) * | 2013-05-20 | 2013-09-04 | 中国科学院过程工程研究所 | 一种锂离子电池负极材料及其制备方法 |
CN107293719B (zh) * | 2017-06-26 | 2020-03-20 | 合肥国轩高科动力能源有限公司 | 一种用于锂离子电池负极的硅-碳复合材料制备方法 |
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CN112086630B (zh) * | 2020-09-17 | 2021-10-08 | 浙江锂宸新材料科技有限公司 | 一种氧化亚硅复合负极材料的制备方法及其产品 |
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CN110660984A (zh) * | 2019-10-15 | 2020-01-07 | 溧阳天目先导电池材料科技有限公司 | 一种纳米硅碳复合材料及其制备方法和应用 |
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