Uniform Li Plating/Stripping within Ni Macropore Arrays Enabled by Regulated Electric Field Distribution for Ultra-Stable Li-Metal Anodes

Yang, Yang; Xiao, Jinfei; Liu, Chaoyue; Chen, Dongjiang; Geng, Hongbo; Zhang, Yufei; Zhao, Jinbao; Li, Cheng Chao; He, Weidong

doi:10.1016/j.isci.2020.101089

Cited by 1 publication

(1 citation statement)

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“…To get deep insight into the electrode/electrolyte interface, the analysis of the SEI composition formed on CF and N-CF was carried out by XPS analysis. The fitted values of the C 1s spectrum can obviously be divided into three peaks corresponding to Li 2 CO 3 or C-F at 289.9 eV, C–C at 286.2 eV, and CC at 284.8 eV, respectively (Figure e). − The N-CF with a larger proportion of oxygen-containing group peaks means that the surface SEI layer consisted of many components of Li 2 CO 3 and ROCO 2 Li. Furthermore, the N-CF exhibits no obvious peak of Li 2 O in the O 1s spectrum relative to the CF (Figure f).…”

Section: Resultsmentioning

confidence: 99%

Self-Standing N-Doped Carbonized Cellulose Fiber as a Dual-Functional Host for Lithium Metal Anodes

Wen

Liu

et al. 2021

ACS Sustainable Chem. Eng.

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Lithium (Li) metal is regarded as the holy grail among various anode candidates due to its extremely high specific energy and low electrochemical potential. Nevertheless, uncontrolled dendrite growth and an unstable electrode/electrolyte interface become the bottleneck for the development of rechargeable Li metal batteries. Although many research studies have focused on designing porous electrode architectures to reduce the local current density and delay the Li dendrite growth, constructing a stable reaction interface is still highly desired. Herein, we ingeniously designed a facile immersion and subsequent annealing method to fabricate a nitrogen-doped carbonized cellulose fiber (N-CF). The nitrogen element can not only bridge the polyacene reaction of cellulose in the process of lower calcination temperatures to improve the mechanical strength but also improve the lithophilic property of a current collector by nitrogen doping at higher calcination temperatures. Therefore, the as-synthesized N-CF can maintain good structural integrity during the cycle and promote the stability of the electrode/electrolyte interface. As a result, when matched with a commercial LiNi0.5Co0.2Mn0.3O2 cathode, the capacity retention of a N-CF//LiNi0.5Co0.2Mn0.3O2 full cell can reach as high as 83.1% after 250 cycles. Our work reveals a facile approach to regulate the Li deposition behavior and stabilize the electrode/electrolyte interface simultaneously.

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