新型硅碳负极材料在轨道交通车辆软包电池中的性能分析及应用展望
石磊高阳王健向蔚然金圣杰韩铎王斯琦
Performance Analysis and Application Prospects of New Silicon-Carbon Anode Materials in Rail Transit Vehicle Soft-pack Batteries
SHI LeiGAO YangWANG JianXIANG WeiranJIN ShengjieHAN DuoWANG Siqi
-
作者信息:中车长春轨道客车股份有限公司国家轨道客车工程研究中心，130062，长春
-
Affiliation:National Engineering Research Center of Railway Vehicles, CRRC Changchun Railway Vehicles Co., Ltd., 130062, Changchun, China
-
关键词:
-
Key words:
-
DOI:10.16037/j.1007-869x.2025.02.022
-
中图分类号/CLCN:TM911.15∶U270.38+1
-
栏目/Col:研究报告
摘要:
［目的］含硅元素的负极材料在城市轨道交通车辆软包电池中的大规模应用面临诸多挑战，其主要问题是因硅元素体积膨胀导致其电性能失效。为解决此问题，需要对新型硅碳负极材料在软包电池中的性能进行更为深入的研究。［方法］对比了含普通硅碳材料的Ah级软包电池(以下简称“N1电池”)、具有镶嵌型结构硅碳材料的Ah级软包电池(以下简称“N2电池”)的循环衰减特性。对这2种电池进行循环性能测试。拆解循环后的电池，对电池的负极材料进行测试，并分析了测试结果，以期从全电池层面验证硅负极结构的优化效果。［结果及结论］N1电池失效原因主要为负极中硅元素体积膨胀过大，引起活性物质脱落和电极断裂等问题，进而导致电池失去电接触。N2电池因纳米级别的硅均匀分散在碳基材料中并被碳元素包裹，在电池循环过程中，硅元素体积膨胀得到了很好的限制，使负极在整个电池循环过程中保持了结构完整性。N2电池的循环性能较N1电池更优。富锂-硅碳体系电池中镶嵌型结构硅碳材料具有良好的应用前景。
Abstracts:
［Objective］ The large-scale application of silicon-containing anode materials in soft-pack battery for urban rail transit vehicles faces many challenges, primarily the failure of electrical performance due to the volume expansion of silicon. To address this issue, a more in-depth studies on the performance of new silicon-carbon anode materials in soft-pack battery is necessary. ［Method］ A comparative analysis is conducted between Ah-level soft-pack batteries containing standard silicon-carbon materials (′N1 batteries′) and those using silicon-carbon materials with an embedded structure (′N2 batteries′) regarding their cycle decay characteristics. Cycle performance tests are carried out on these two types of batteries, and post-cycle analysis is conducted on the disassembled batteries. The anode materials are tested and the results are analyzed to verify the optimization effects of the silicon anode structure at the full battery level. ［Result & Conclusion］ The main cause of failure in N1 batteries is excessive volume expansion of silicon in the anode, leading to the detachment of active materials and electrode breakage, ultimately resulting in the loss of electrical contact. In N2 batteries, the nanoscale silicon is uniformly dispersed within the carbon-based materials and encapsulated by carbon, effectively limiting the volume expansion of silicon during the battery cycle and maintaining structural integrity of the anode throughout the entire cycle process. The cycle performance of N2 batteries is superior to that of N1 batteries. Embedded structure silicon-carbon materials in lithium-rich silicon-carbon system batteries show promising application prospects.
- 上一篇: 高铁物流运输模式及其可行性
- 下一篇: 超大规模城市轨道交通网络的车辆高质量运维管理模式
过刊浏览
资料下载
友情链接