In situ synthesis of core-shell structured Ge@NC hybrids as high performance anode material for lithium-ion batteries
文献类型：期刊论文
| 作者 | Wang, Bangrun; Jin, Jun; Wen, Zhaoyin |
| 刊名 | CHEMICAL ENGINEERING JOURNAL
 |
| 出版日期 | 2019-03-15 |
| 卷号 | 360页码:1301 |
| 关键词 | Lithium-ion batteries Anode materials Germanium Spray pyrolysis Core-shell structure |
| ISSN号 | 1385-8947 |
| DOI | 10.1016/j.cej.2018.09.113 |
| 文献子类 | Article |
| 英文摘要 | Core-shell structured germanium@nitrogen-doped carbon (Ge@NC) hybrids with well-encapsulated Ge particles within a conductive coating is an ideal anode material for high energy and power density lithium-ion batteries (LIBs). Here, we propose a novel route to synthesize core-shell structured Ge@NC hybrids by the modified in situ spray pyrolysis technique using a mixed spray solution consisting of a Ge precursor as an active material source and polyvinylpyrrolidone (PVP) as a carbon source. It is found that in situ formed submicron Ge (200-800 nm) crystals encapsulated in a N-doped carbon coating, allows the increase of electrical conductivity for Ge with enhanced structural stability. For lithium storage, the Ge@NC hybrids exhibit superior properties compared to that of pure Ge such as excellent long-term cycling stability (917 mAh g(-1) with a capacity decay of 0.018% per cycle for 1000 cycles at 1 C) and outstanding rate capability (806 mAh g(-1) at 5 C after 400 cycles). The full cell assembled with Ge@NC anode and LiNi0.5Co0.2Mn0.3O2 cathode presents high energy density. Moreover, the spray pyrolysis method allows a yield of similar to 4.8 g h(-1) with a lab-scale equipment, demonstrating that established industrial processes can be applied to produce Ge-based anodes with sophisticated structures. |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCIENCE SA |
| 源URL | [http://ir.sic.ac.cn/handle/331005/27271]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Wang, Bangrun,Jin, Jun,Wen, Zhaoyin. In situ synthesis of core-shell structured Ge@NC hybrids as high performance anode material for lithium-ion batteries[J]. CHEMICAL ENGINEERING JOURNAL,2019,360:1301. |
| APA | Wang, Bangrun,Jin, Jun,&Wen, Zhaoyin.(2019).In situ synthesis of core-shell structured Ge@NC hybrids as high performance anode material for lithium-ion batteries.CHEMICAL ENGINEERING JOURNAL,360,1301. |
| MLA | Wang, Bangrun,et al."In situ synthesis of core-shell structured Ge@NC hybrids as high performance anode material for lithium-ion batteries".CHEMICAL ENGINEERING JOURNAL 360(2019):1301. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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