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Ni3N Nanocrystals Decorated Reduced Graphene Oxide with High Ionic Conductivity for Stable Lithium Metal Anode
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-03-14 00:00:00 , DOI: 10.1021/acsaem.9b00014 Lingfei Zhao 1 , Wenhui Wang 1 , Xixia Zhao 1 , Zhen Hou 1 , Xiaokun Fan 1 , Yulian Liu 1 , Zewei Quan 1
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2019-03-14 00:00:00 , DOI: 10.1021/acsaem.9b00014 Lingfei Zhao 1 , Wenhui Wang 1 , Xixia Zhao 1 , Zhen Hou 1 , Xiaokun Fan 1 , Yulian Liu 1 , Zewei Quan 1
Affiliation
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Lithium (Li) metal is the ultimate choice of anode material for high energy density rechargeable Li batteries, yet its practical application has been seriously hindered due to fast capacity decay, infinite volume expansion, and uncontrolled dendrite formation. Herein, we report the utilization of Ni3N nanocrystals decorated nitrogen doped reduced graphene oxide (Ni3[email protected]) coated Cu as a stable host for the lithium metal anode. The uniformly distributed Ni3N nanocrystals can be in situ converted into Li3N, which leads to high ionic conductivity and homogeneous Li-ion flux distribution of the 3D N-RGO matrix. As a result, the Ni3[email protected]/Cu electrode presents a stable Li plating/strapping for 1400 h at 1 mA cm–2 with a small overpotential of ∼30 mV. The improved electrochemical stability is demonstrated as the smooth and dense surfaces of the plated metallic Li on Ni3[email protected]/Cu electrode over 300 cycles. The Li||LiFePO4 full cells with Li/Ni3[email protected]/Cu anode present improved rate and cycling performances. These results indicate that improving the ionic conductivity of 3D graphene based hosts with uniformly distributed Ni3N nanocrystals is a feasible approach for a stable Li metal anode.
中文翻译：
Ni 3 N纳米晶修饰稳定的锂金属阳极的高离子电导率还原氧化石墨烯
锂（Li）金属是高能量密度可充电锂电池负极材料的最终选择，但由于容量快速衰减，无限的体积膨胀和不受控制的枝晶形成，严重阻碍了其实际应用。在此，我们报道了利用Ni 3 N纳米晶体装饰的氮掺杂的还原氧化石墨烯（Ni 3 [受电子邮件保护]）涂层的Cu作为锂金属阳极的稳定基质。均匀分布的Ni 3 N纳米晶体可以原位转化为Li 3 N，这导致3D N-RGO基体具有较高的离子电导率和均匀的Li离子通量分布。结果，Ni 3[受电子邮件保护] / Cu电极在1 mA cm -2的条件下在1400 h内具有稳定的Li镀层/剥离性能，过电位约为30 mV。在300次循环中，Ni 3 [受电子邮件保护] / Cu电极上的金属Li的光滑致密表面证明了电化学稳定性得到了改善。具有Li / Ni 3 [受电子邮件保护] / Cu阳极的Li || LiFePO 4全电池具有更高的速率和循环性能。这些结果表明，利用具有均匀分布的Ni 3 N纳米晶体来提高3D石墨烯基主体的离子电导率是稳定锂金属阳极的可行方法。
更新日期：2019-03-14
中文翻译：
Ni 3 N纳米晶修饰稳定的锂金属阳极的高离子电导率还原氧化石墨烯
锂（Li）金属是高能量密度可充电锂电池负极材料的最终选择，但由于容量快速衰减，无限的体积膨胀和不受控制的枝晶形成，严重阻碍了其实际应用。在此，我们报道了利用Ni 3 N纳米晶体装饰的氮掺杂的还原氧化石墨烯（Ni 3 [受电子邮件保护]）涂层的Cu作为锂金属阳极的稳定基质。均匀分布的Ni 3 N纳米晶体可以原位转化为Li 3 N，这导致3D N-RGO基体具有较高的离子电导率和均匀的Li离子通量分布。结果，Ni 3[受电子邮件保护] / Cu电极在1 mA cm -2的条件下在1400 h内具有稳定的Li镀层/剥离性能，过电位约为30 mV。在300次循环中，Ni 3 [受电子邮件保护] / Cu电极上的金属Li的光滑致密表面证明了电化学稳定性得到了改善。具有Li / Ni 3 [受电子邮件保护] / Cu阳极的Li || LiFePO 4全电池具有更高的速率和循环性能。这些结果表明，利用具有均匀分布的Ni 3 N纳米晶体来提高3D石墨烯基主体的离子电导率是稳定锂金属阳极的可行方法。
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