Nitrogen-doped polymer nanofibers decorated with Co nanoparticles for uniform lithium nucleation/growth in lithium metal batteries

Nanoscale ◽  
2020 ◽  
Vol 12 (16) ◽  
pp. 8819-8827 ◽  
Author(s):  
Miao Shu ◽  
Xing Li ◽  
Liqiang Duan ◽  
Mengting Zhu ◽  
Xing Xin
Keyword(s):  
Lithium Metal ◽  
Polymer Nanofibers ◽  
Nitrogen Doped ◽  
Lithium Metal Batteries ◽  
3D Matrix ◽  
Co Nanoparticles ◽  
Doped Polymer ◽  
Nucleation Growth

Tiny “lithiophilic” Co nanoparticles on a 3D matrix induce the uniform nucleation/growth of Li.

scholarly journals Constructing multifunctional solid electrolyte interface via in-situ polymerization for dendrite-free and low N/P ratio lithium metal batteries

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dan Luo ◽  
Lei Zheng ◽  
Zhen Zhang ◽  
Matthew Li ◽  
Zhongwei Chen ◽  
...  
Keyword(s):  
Solid Electrolyte ◽  
In Situ Polymerization ◽  
Dendrite Growth ◽  
Solid Electrolyte Interface ◽  
Lithium Metal ◽  
Growth Orientation ◽  
Lithium Metal Batteries ◽  
Electrolyte Interface ◽  
Nucleation Growth

AbstractStable solid electrolyte interface (SEI) is highly sought after for lithium metal batteries (LMB) owing to its efficient electrolyte consumption suppression and Li dendrite growth inhibition. However, current design strategies can hardly endow a multifunctional SEI formation due to the non-uniform, low flexible film formation and limited capability to alter Li nucleation/growth orientation, which results in unconstrained dendrite growth and short cycling stability. Herein, we present a novel strategy to employ electrolyte additives containing catechol and acrylic groups to construct a stable multifunctional SEI by in-situ anionic polymerization. This self-smoothing and robust SEI offers multiple sites for Li adsorption and steric repulsion to constrain nucleation/growth process, leading to homogenized Li nanosphere formation. This isotropic nanosphere offers non-preferred Li growth orientation, rendering uniform Li deposition to achieve a dendrite-free anode. Attributed to these superiorities, a remarkable cycling performance can be obtained, i.e., high current density up to 10 mA cm−2, ultra-long cycle life over 8500 hrs operation, high cumulative capacity over 4.25 Ah cm−2 and stable cycling under 60 °C. A prolonged lifespan can also be achieved in Li-S and Li-LiFePO4 cells under lean electrolyte content, low N/P ratio or high temperature conditions. This facile strategy also promotes the practical application of LMB and enlightens the SEI design in related fields.

Efficient Diffusion of Superdense Lithium via Atomic Channel for Dendrite-Free Lithium-Metal Batteries

2021 ◽  
Author(s):  
Shiyuan Zhou ◽  
Weixin Chen ◽  
Jie Shi ◽  
Gen Li ◽  
Fei Pei ◽  
...  
Keyword(s):  
Dendrite Growth ◽  
Anode Surface ◽  
Lithium Metal ◽  
Lithium Metal Batteries ◽  
Efficient Diffusion ◽  
Nucleation Growth

The non-uniform aggregation of fast-diffused Li on anode surface would aggravate its tip-effect-induced nucleation/growth, leading to the notorious dendrite growth in Li metal batteries (LMBs). Tuning Li diffusion on anode...

scholarly journals Excellent Performances of Composite Polymer Electrolytes with Porous Vinyl-Functionalized SiO2 Nanoparticles for Lithium Metal Batteries

Polymers ◽  
2021 ◽  
Vol 13 (15) ◽  
pp. 2468
Author(s):  
Hui Zhan ◽  
Mengjun Wu ◽  
Rui Wang ◽  
Shuohao Wu ◽  
Hao Li ◽  
...  
Keyword(s):  
Polymer Electrolytes ◽  
Specific Capacity ◽  
Sio2 Nanoparticles ◽  
Inorganic Materials ◽  
Solid Polymer Electrolytes ◽  
Lithium Metal ◽  
Composite Polymer ◽  
Composite Electrolyte ◽  
Composite Polymer Electrolytes ◽  
Lithium Metal Batteries

Composite polymer electrolytes (CPEs) incorporate the advantages of solid polymer electrolytes (SPEs) and inorganic solid electrolytes (ISEs), which have shown huge potential in the application of safe lithium-metal batteries (LMBs). Effectively avoiding the agglomeration of inorganic fillers in the polymer matrix during the organic–inorganic mixing process is very important for the properties of the composite electrolyte. Herein, a partial cross-linked PEO-based CPE was prepared by porous vinyl-functionalized silicon (p-V-SiO2) nanoparticles as fillers and poly (ethylene glycol diacrylate) (PEGDA) as cross-linkers. By combining the mechanical rigidity of ceramic fillers and the flexibility of PEO, the as-made electrolyte membranes had excellent mechanical properties. The big special surface area and pore volume of nanoparticles inhibited PEO recrystallization and promoted the dissolution of lithium salt. Chemical bonding improved the interfacial compatibility between organic and inorganic materials and facilitated the homogenization of lithium-ion flow. As a result, the symmetric Li|CPE|Li cells could operate stably over 450 h without a short circuit. All solid Li|LiFePO4 batteries were constructed with this composite electrolyte and showed excellent rate and cycling performances. The first discharge-specific capacity of the assembled battery was 155.1 mA h g−1, and the capacity retention was 91% after operating for 300 cycles at 0.5 C. These results demonstrated that the chemical grafting of porous inorganic materials and cross-linking polymerization can greatly improve the properties of CPEs.

Lithiophilic N-doped carbon bowls induced Li deposition in layered graphene film for advanced lithium metal batteries

Nano Research ◽  
2021 ◽  
Author(s):  
Xiaoyu Feng ◽  
Hong-Hui Wu ◽  
Biao Gao ◽  
Michał Świętosławski ◽  
Xin He ◽  
...  
Keyword(s):  
Graphene Film ◽  
Lithium Metal ◽  
Lithium Metal Batteries
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