Nitrogen-doped graphdiyne nanowall stabilized dendrite-free lithium metal anodes†,Journal of Materials Chemistry A

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Nitrogen-doped graphdiyne nanowall stabilized dendrite-free lithium metal anodes†
Journal of Materials Chemistry A ( IF 10.7 ) Pub Date : 2019-11-15 , DOI: 10.1039/c9ta09551a
Tao Jiang _{1,

2,

3,

4,

5} , Ke Chen _{6,

7,

8,

9,

10} , Jingjing Wang _{10,

11,

12,

13,

14} , Zhongli Hu _{1,

2,

3,

4,

5} , Gulian Wang _{1,

2,

3,

4,

5} , Xu-Dong Chen _{10,

11,

12,

13,

14} , Pengfei Sun _{1,

2,

3,

4,

5} , Qiaobao Zhang _{10,

15,

16,

17,

18} , Chenglin Yan _{1,

2,

3,

4,

5} , Li Zhang _{1,

2,

3,

4,

5}

Affiliation

College of Energy
Soochow Institute for Energy and Materials Innovations
Key Laboratory of Advanced Carbon Materials and Wearable Energy Technologies of Jiangsu Province
Soochow University
Suzhou 215006
Institute of Micro/Nano Photonic Materials and Applications
School of Physics and Electronics
Henan University
Kaifeng 475004
China
Institute for New Energy Materials and Low Carbon Technologies
School of Materials Science and Engineering
Tianjin University of Technology
Tianjin 300384
Department of Materials Science and Engineering
College of Materials
Xiamen University
Xiamen 361005

Lithium constitutes an ultimate anode material for Li metal-based batteries (LMBs, e.g., Li–S and Li–air). Nevertheless, the dendritic Li growth during repeated plating/stripping processes would cause fast capacity decay and serious safety concerns. The integration of porous current collectors with carbon nanomaterials has attracted special interest recently in suppression of Li dendrite growth. However, the large amounts of Li plating under high power conditions remain a major challenge for such hosts because most nanocarbons suffer from poor lithiophilicity. Herein, for the first time, nitrogen-doped graphdiyne nanowall-modified copper foam (N-GDY) is prepared as a highly lithiophilic host to achieve high-rate dendrite-free Li plating with high areal capacities. Such a N-GDY host features highly lithiophilic N-containing groups, abundant graphdiyne nanopores and a stable Li plating interface, guaranteeing a quite low nucleation overpotential of 13 mV and a plating/stripping coulombic efficiency of above 99.0% under synergistic conditions with high current density and areal capacity. Hence, the N-GDY@Li anode maintains a dendrite-free morphology and low voltage hysteresis under a harsh working condition for over 350 h, significantly outperforming the counterparts deposited on other carbon films. Furthermore, the N-GDY@Li anode-derived full cells also exhibit enhanced electrochemical performance towards practical applications of advanced LMBs.

中文翻译：

氮掺杂的graphdiyne纳米壁稳定的无枝晶锂金属阳极†

锂构成用于锂金属基电池（LMBS，一个最终的阳极材料例如，Li–S和Li–air）。然而，在重复的电镀/剥离过程中树枝状锂的生长会导致容量快速下降和严重的安全隐患。近年来，多孔集流体与碳纳米材料的集成引起了人们对抑制锂枝晶生长的特别关注。然而，由于大多数纳米碳都具有不良的亲硫性，因此在高功率条件下大量的锂镀层仍然是此类主体面临的主要挑战。在此，首次制备了氮掺杂的石墨烯二氧化氮纳米壁改性的铜泡沫（N-GDY）作为高度亲脂性的基质，以实现具有高面积容量的高速率无枝晶锂镀层。这样的N-GDY主体具有高度亲硫的N基团，丰富的石墨二炔纳米孔和稳定的Li镀层界面，在具有高电流密度和面积容量的协同条件下，可确保13 mV的极低的成核超电势和99.0％以上的电镀/剥离库伦效率。因此，N-GDY @ Li阳极在苛刻的工作条件下保持超过350小时的无枝晶形态和低压磁滞现象，明显优于沉积在其他碳膜上的对应物。此外，N-GDY @ Li阳极衍生的全电池在高级LMB的实际应用中也表现出增强的电化学性能。大大优于沉积在其他碳膜上的同类产品。此外，N-GDY @ Li阳极衍生的全电池在高级LMB的实际应用中也表现出增强的电化学性能。大大优于沉积在其他碳膜上的同类产品。此外，N-GDY @ Li阳极衍生的全电池在高级LMB的实际应用中也表现出增强的电化学性能。

更新日期：2019-12-11

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