Molecular-Scale Functionality on Graphene To Unlock the Energy Capabilities of Metal Hydrides for High-Capacity Lithium-Ion Batteries
文献类型：期刊论文
| 作者 | Xia, Guanglin1,2; Zhang, Baoping1; Chen, Xiaowei4; Sun, Dalin1; Guo, Zaiping2; Liang, Fuxin3; Zou, Weidong4; Yang, Zhenzhong3 ; Yu, Xuebin1
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| 刊名 | ACS NANO
 |
| 出版日期 | 2018-08-01 |
| 卷号 | 12期号:8页码:8177-8186 |
| 关键词 | Lithium-ion Batteries Metal Hydride Magnesium Hydride Graphene Self-assembly |
| ISSN号 | 1936-0851 |
| DOI | 10.1021/acsnano.8b03280 |
| 英文摘要 | Metal hydrides have attracted great intentions as anodes for lithium-ion batteries (LIBs) due to their extraordinary theoretical capacity. It is an unsolved challenge, however, to achieve high capacity with stable cyclability, owing to their insulating property and large volume expansion upon lithium storage. Here, we introduce self-initiated polymerization to realize molecular-scale functionality of metal hydrides with conductive polymer, that is, polythiophene (PTh), on graphene, leading to the formation of MgH2@PTh core-shell nanoparticles on graphene. The nanoscale characteristics of MgH2 not only relieve the induced stress upon volume changes but also allow fast diffusivity and high reactivity for Li-ion transport. More importantly, the conformal coating of ultrathin PTh membrane can effectively suppress the detrimental reactions between MgH2 and electrolyte, provide enhanced performance with facile electron and Li+ transport, and preserve its structural integrity, attributed to the strong molecular interaction between PTh and MgH2 as well as its various products during electrochemical reactions. With this structure, a high reversible specific capacity of 1311 mAh g(-1) at 100 mA g(-1), excellent rate performance of 1025 mAh g(-1) at 2000 mA g(-1) and a capacity retention of 84.5% at 2000 mA g(-1) after 500 cycles are observed for MgH2@PTh nanoparticles as anode for LIBs. |
| 语种 | 英语 |
| WOS记录号 | WOS:000443525600068 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.iccas.ac.cn/handle/121111/41893]  |
| 专题 | 中国科学院化学研究所 |
| 通讯作者 | Yang, Zhenzhong; Yu, Xuebin |
| 作者单位 | 1.Fudan Univ, Dept Mat Sci, Shanghai 200433, Peoples R China 2.Univ Wollongong, Inst Superconducting & Elect Mat, North Wollongong, NSW 2522, Australia 3.Chinese Acad Sci, Inst Chem, State Key Lab Polymer Phys & Chem, Beijing 100190, Peoples R China 4.Jimei Univ, Dept Phys, Xiamen 361021, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xia, Guanglin,Zhang, Baoping,Chen, Xiaowei,et al. Molecular-Scale Functionality on Graphene To Unlock the Energy Capabilities of Metal Hydrides for High-Capacity Lithium-Ion Batteries[J]. ACS NANO,2018,12(8):8177-8186. |
| APA | Xia, Guanglin.,Zhang, Baoping.,Chen, Xiaowei.,Sun, Dalin.,Guo, Zaiping.,...&Yu, Xuebin.(2018).Molecular-Scale Functionality on Graphene To Unlock the Energy Capabilities of Metal Hydrides for High-Capacity Lithium-Ion Batteries.ACS NANO,12(8),8177-8186. |
| MLA | Xia, Guanglin,et al."Molecular-Scale Functionality on Graphene To Unlock the Energy Capabilities of Metal Hydrides for High-Capacity Lithium-Ion Batteries".ACS NANO 12.8(2018):8177-8186. |
入库方式： OAI收割
来源：化学研究所
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