KMS Shanghai Institute of Ceramics，Chinese Academy of Sciences
| Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage | |
| Hu, YF; Li, ZC; Hu, ZC; Wang, L; Ma, RG; Wang, JC | |
| 2020-10-22 | |
| Source Publication | SMALL
 |
| ISSN | 1613-6810 |
| Issue | 42 |
| Subtype | Article |
| Abstract | The inferior conductivity and large volume expansion impair the widespread applications of metal oxide-based anode materials for lithium-ion batteries. To address these issues, herein an efficient strategy of structural engineering is proposed to improve lithium storage performance of hierarchical CoO nanospheres wrapped by graphene via controllable S-doping (CoOS0.1 @ G). S-doping promotes the Li(+)diffusion kinetics of CoO by expanding the interplanar spacing of CoO, lowering the activation energy, and improving the pseudocapacitance contribution. Meanwhile, the electronic structure of CoO is adjusted by S-doping as confirmed by density functional theory calculations, thus enhancing the conductivity. Finite element analysis reveals that the produced Li2S during lithiation improves the structural stability of the S-doped electrode, which is further confirmed by experimental observation. As expected, CoOS0.1 @ G exhibits excellent lithium storage performance with an initial discharge capacity of 1974 mAh g(-1)at 100 mA g(-1), and high discharge capacity of 1573 mAh g(-1)after 400 cycles at 500 mA g(-1). It is believed that the insights into the structural doping enlighten research to explore other metal oxides for fast and stable Li ion storage. |
| DOI | 10.1002/smll.202003643 |
| WOS Keyword | BINDER-FREE ; HIGH-CAPACITY ; LITHIUM ; BATTERIES ; NANOCOMPOSITE ; ENHANCEMENT ; SPHERES ; ANODES |
| Language | 英语 |
| WOS Research Area | Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics |
| Publisher | WILEY-V C H VERLAG GMBH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.sic.ac.cn/handle/331005/27733 |
| Collection | 中国科学院上海硅酸盐研究所 |
| Recommended Citation GB/T 7714 | Hu, YF,Li, ZC,Hu, ZC,et al. Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage[J]. SMALL,2020(42). |
| APA | Hu, YF,Li, ZC,Hu, ZC,Wang, L,Ma, RG,&Wang, JC.(2020).Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage.SMALL(42). |
| MLA | Hu, YF,et al."Engineering Hierarchical CoO Nanospheres Wrapped by Graphene via Controllable Sulfur Doping for Superior Li Ion Storage".SMALL .42(2020). |
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