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Regulating Lithium Nucleation and Deposition via MOF‐Derived Co@C‐Modified Carbon Cloth for Stable Li Metal Anode
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-02-20 , DOI: 10.1002/adfm.201909159 Ting Zhou 1 , Jiadong Shen 1 , Zhuosen Wang 1 , Jun Liu 1 , Renzong Hu 1 , Liuzhang Ouyang 1 , Yuezhan Feng 2 , Hui Liu 3 , Yan Yu 4, 5, 6 , Min Zhu 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2020-02-20 , DOI: 10.1002/adfm.201909159 Ting Zhou 1 , Jiadong Shen 1 , Zhuosen Wang 1 , Jun Liu 1 , Renzong Hu 1 , Liuzhang Ouyang 1 , Yuezhan Feng 2 , Hui Liu 3 , Yan Yu 4, 5, 6 , Min Zhu 1
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Lithium metal is an exciting anode candidate with extra high theoretical specific capacity for new high‐energy rechargeable batteries. However, uncontrolled Li deposition and an unsteady solid electrolyte interface seriously obstruct the commercial application of Li anodes in Li metal batteries. Herein, 3D carbon cloth (CC) supporting N‐doped carbon (CN) nanosheet arrays embedded with tiny Co nanoparticles (CC@CN‐Co) are employed as a lithiophilic framework to regulate homogenous Li nucleation/growth behavior in a working Li metal anode. The emergence of Li dendrites is supposed to be inhibited by the conductive 3D scaffold that reduces local current density. The uniform nucleation of Li can be guided by N‐containing functional groups as they have a strong interaction with Li atoms, and the tiny Co nanoparticles can provide active sites to guide Li deposition. As a result, the current CC@CN‐Co host exhibits Li dendrite–free features and stable cycling performance with a low overpotential (20 mV) throughout 800 h cycles. When paired with the typical LiFePO4 (LFP) cathode, the assembled CC@CN‐Co@Li//LFP@C full cell exhibits outstanding rate capability and improved cycling performance.
中文翻译：
通过MOF衍生的Co @ C修饰碳布调节锂成核和沉积，以稳定锂金属阳极
金属锂是一种令人兴奋的阳极候选材料，它对新型高能可充电电池具有极高的理论比容量。然而，不受控制的锂沉积和不稳定的固体电解质界面严重阻碍了锂阳极在锂金属电池中的商业应用。在本文中，支持嵌入微小Co纳米颗粒（CC @ CN-Co）的支持N掺杂碳（CN）纳米片阵列的3D碳布（CC）被用作亲硫性骨架，以调节可工作的锂金属阳极中均匀的锂成核/生长行为。锂的树枝状晶体的出现被认为可以通过降低局部电流密度的导电3D支架来抑制。Li的均匀成核作用可以由含N的官能团引导，因为它们与Li原子具有很强的相互作用，微小的Co纳米粒子可以提供活性部位来引导Li的沉积。因此，当前的CC @ CN‐Co主机在整个800 h周期内均表现出无Li枝晶的特性和稳定的循环性能，且低过电势（20 mV）。与典型的LiFePO配对时4（LFP）阴极，组装后的CC @ CN-Co @ Li // LFP @ C全电池具有出色的倍率能力和改善的循环性能。
更新日期：2020-04-06
中文翻译：
通过MOF衍生的Co @ C修饰碳布调节锂成核和沉积，以稳定锂金属阳极
金属锂是一种令人兴奋的阳极候选材料，它对新型高能可充电电池具有极高的理论比容量。然而，不受控制的锂沉积和不稳定的固体电解质界面严重阻碍了锂阳极在锂金属电池中的商业应用。在本文中，支持嵌入微小Co纳米颗粒（CC @ CN-Co）的支持N掺杂碳（CN）纳米片阵列的3D碳布（CC）被用作亲硫性骨架，以调节可工作的锂金属阳极中均匀的锂成核/生长行为。锂的树枝状晶体的出现被认为可以通过降低局部电流密度的导电3D支架来抑制。Li的均匀成核作用可以由含N的官能团引导，因为它们与Li原子具有很强的相互作用，微小的Co纳米粒子可以提供活性部位来引导Li的沉积。因此，当前的CC @ CN‐Co主机在整个800 h周期内均表现出无Li枝晶的特性和稳定的循环性能，且低过电势（20 mV）。与典型的LiFePO配对时4（LFP）阴极，组装后的CC @ CN-Co @ Li // LFP @ C全电池具有出色的倍率能力和改善的循环性能。
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