Nanodiamonds suppress the growth of lithium dendrites.
Nanodiamonds suppress the growth of lithium dendrites.
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纳米原木抑制锂树突的生长。
DOI：
10.1038/s41467-017-00519-2
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发表时间：
2017-08-25
影响因子：
16.6
通讯作者：
Gogotsi Y
中科院分区：
文献类型：
--
作者：
Cheng XB;Zhao MQ;Chen C;Pentecost A;Maleski K;Mathis T;Zhang XQ;Zhang Q;Jiang J;Gogotsi Y
金属锂以其负电化学势和高理论容量的良好结合，被认为是未来高能量密度二次电池的负极材料。然而，在镀锂/脱锂过程中，锂的沉积不受控制，导致库仑效率低，存在严重的安全隐患。在此，我们报道了纳米金刚石作为电解液添加剂与锂离子共沉积并产生无树枝晶的锂沉积。第一性原理计算表明，锂更倾向于吸附在具有低扩散能垒的纳米金刚石表面，导致均匀沉积锂阵列。均匀的锂沉积形态提高了电化学循环性能。纳米金刚石修饰的电解液可以使锂/锂对称电池在2.0 和1.0 Ma cm-2时分别稳定循环到150和200 Mpa h。纳米金刚石共沉积可以显著改变锂的电镀行为，为抑制锂金属电池中锂枝晶的生长提供了一条很有前途的途径。金属锂是一种理想的二次电池负极材料，但存在锂枝晶长大和库仑效率低的问题。研究表明，纳米金刚石可作为电解液添加剂，与金属锂共沉积，抑制枝晶的形成。
Lithium metal has been regarded as the future anode material for high-energy-density rechargeable batteries due to its favorable combination of negative electrochemical potential and high theoretical capacity. However, uncontrolled lithium deposition during lithium plating/stripping results in low Coulombic efficiency and severe safety hazards. Herein, we report that nanodiamonds work as an electrolyte additive to co-deposit with lithium ions and produce dendrite-free lithium deposits. First-principles calculations indicate that lithium prefers to adsorb onto nanodiamond surfaces with a low diffusion energy barrier, leading to uniformly deposited lithium arrays. The uniform lithium deposition morphology renders enhanced electrochemical cycling performance. The nanodiamond-modified electrolyte can lead to a stable cycling of lithium | lithium symmetrical cells up to 150 and 200 h at 2.0 and 1.0 mA cm–2, respectively. The nanodiamond co-deposition can significantly alter the lithium plating behavior, affording a promising route to suppress lithium dendrite growth in lithium metal-based batteries. Lithium metal is an ideal anode material for rechargeable batteries but suffer from the growth of lithium dendrites and low Coulombic efficiency. Here the authors show that nanodiamonds serve as an electrolyte additive to co-deposit with lithium metal and suppress the formation of dendrites.
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影响因子：
15.1
作者：
Peng, Hong-Jie;Wang, Dai-Wei;Huang, Jia-Qi;Cheng, Xin-Bing;Yuan, Zhe;Wei, Fei;Zhang, Qiang
通讯作者：
Zhang, Qiang
影响因子：
15
作者：
Ding, Fei;Xu, Wu;Zhang, Ji-Guang
通讯作者：
Zhang, Ji-Guang
影响因子：
16.6
作者：
Li, Weiyang;Yao, Hongbin;Cui, Yi
通讯作者：
Cui, Yi
影响因子：
5.4
作者：
Medeliene, V;Stankevic, V;Bikulcius, G
通讯作者：
Bikulcius, G
影响因子：
2.9
作者：
Pavlatou, EA;Stroumbouli, M;Spyrellis, N
通讯作者：
Spyrellis, N