KMS Shanghai Institute of Ceramics，Chinese Academy of Sciences
| Liquid Polydimethylsiloxane Grafting to Enable Dendrite-Free Li Plating for Highly Reversible Li-Metal Batteries | |
| Meng, Junwei; Chu, Fulu; Hu, Jiulin; Li, Chilin | |
| 2019-07-01 | |
| Source Publication | ADVANCED FUNCTIONAL MATERIALS
 |
| ISSN | 1616-301X |
| Volume | 29Issue:30 |
| Subtype | Article |
| Abstract | Li-metal is considered as the most promising anode material to advance the development of next-generation energy storage devices owing to its unparalleled theoretical specific capacity and extremely low redox electrochemical potential. However, safety concerns and poor cycling retention of Li-metal batteries (LMBs) caused by uncontrolled Li dendrite growth still limit their broad application. Herein, liquid polydimethylsiloxane (PDMS) terminated by -OCH3 groups is proposed as a graftable additive to reinforce the anode dendrite suppression for LMBs. Such a grafting triggers the formation of a conformal hybrid solid electrolyte interphase (SEI) with increased fractions of LiF and Li-Si-O-based moieties, which serve as a rigid barrier and ionic conductor for uniform Li-ion flow and Li-mass deposition. The grafting protected anode endows Li/Li symmetric cells with a long lifetime over 1800 h with a much smaller voltage gap (approximate to 25 my) between Li plating and stripping, than the naked anode. The coulombic efficiency values for Li/Cu asymmetric cells in carbonate electrolyte can reach up to 97% even at a high current density of 3 mA cm(-2) or high capacity up to 4 mAh cm(-2). The liquid PDMS additive shows advantage over solid siloxane additives with poor grafting ability in terms of Li surface compaction and SEI stabilization. |
| Keyword | electrolyte additives grafting protection liquid polydimethylsiloxane lithium dendrite suppression lithium-metal batteries |
| DOI | 10.1002/adfm.201902220 |
| 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/331005/26996 |
| Collection | 中国科学院上海硅酸盐研究所 |
| Recommended Citation GB/T 7714 | Meng, Junwei,Chu, Fulu,Hu, Jiulin,et al. Liquid Polydimethylsiloxane Grafting to Enable Dendrite-Free Li Plating for Highly Reversible Li-Metal Batteries[J]. ADVANCED FUNCTIONAL MATERIALS,2019,29(30). |
| APA | Meng, Junwei,Chu, Fulu,Hu, Jiulin,&Li, Chilin.(2019).Liquid Polydimethylsiloxane Grafting to Enable Dendrite-Free Li Plating for Highly Reversible Li-Metal Batteries.ADVANCED FUNCTIONAL MATERIALS,29(30). |
| MLA | Meng, Junwei,et al."Liquid Polydimethylsiloxane Grafting to Enable Dendrite-Free Li Plating for Highly Reversible Li-Metal Batteries".ADVANCED FUNCTIONAL MATERIALS 29.30(2019). |
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