Ultrathin Defective C-N Coating to Enable Nanostructured Li Plating for Li Metal Batteries
文献类型：期刊论文
| 作者 | Yang, QF; Cui, MN; Hu, JL; Chu, FL; Zheng, YJ; Liu, JJ; Li, CL |
| 刊名 | ACS NANO
 |
| 出版日期 | 2020-02-01 |
| 期号 | 2页码:1866 |
| ISSN号 | 1936-0851 |
| DOI | 10.1021/acsnano.9b08008 |
| 文献子类 | Article |
| 英文摘要 | Lithium metal batteries (LMBs) are obtaining increasing attention in view of their advantage of theoretical energy density up to 500 Wh kg(-1) or higher. However, their performance exploitation is still retarded by anode dendrite growth, dead Li buildup, and electric contact loss at the interface. In order to overcome these challenges, herein, we proposed a defect engineering of a C-N polymer to construct a N-deficient ultrathin film (27 nm) with an unusually narrow bandgap (0.63 eV) as an artificial solid electrolyte interphase (SEI) by reactive thermal evaporation. This defective C-N film enables a nanostructured modulation of Li plating without severe dendrite extrusion and electric disconnection. Its high lithiophilicity is expected to trigger a desired space charge effect in the SEI with enhanced charge-transfer ability, which leads to significant reduction of both the nucleation (17.5 mV at 1 mA cm(-2)) and plateau overpotentials (70 mV at 3 mA cm(-2)) during Li plating and stripping. This interposition of a defect structure also endows Li/Cu cells with extended cycling reversibility over 400 cycles and a highly stable Coulombic efficiency of 99% at 3 mA cm(-2). The interconnection preservation of the Li plating network modulated by the C-N interphase guarantees a high capacity retention of LiFePO4 based LMBs. The advantage of N-extraction from C3N4 is comprehensively discussed in combination with the results based on g-C3N4 decoration. |
| WOS关键词 | GRAPHITIC CARBON NITRIDE ; LITHIUM ; ANODES ; ELECTROLYTE ; DEPOSITION ; LIQUID |
| WOS研究方向 | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 语种 | 英语 |
| 出版者 | AMER CHEMICAL SOC |
| 源URL | [http://ir.sic.ac.cn/handle/331005/28335]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Yang, QF,Cui, MN,Hu, JL,et al. Ultrathin Defective C-N Coating to Enable Nanostructured Li Plating for Li Metal Batteries[J]. ACS NANO,2020(2):1866. |
| APA | Yang, QF.,Cui, MN.,Hu, JL.,Chu, FL.,Zheng, YJ.,...&Li, CL.(2020).Ultrathin Defective C-N Coating to Enable Nanostructured Li Plating for Li Metal Batteries.ACS NANO(2),1866. |
| MLA | Yang, QF,et al."Ultrathin Defective C-N Coating to Enable Nanostructured Li Plating for Li Metal Batteries".ACS NANO .2(2020):1866. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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