Synthesis of a 2D nitrogen-rich π-conjugated microporous polymer for high performance lithium-ion batteries

2019 ◽  
Vol 55 (64) ◽  
pp. 9491-9494 ◽  
Author(s):  
Lingkun Meng ◽  
Siyuan Ren ◽  
Chenhui Ma ◽  
Ying Yu ◽  
Yue Lou ◽  
...  
Keyword(s):  
High Performance ◽  
High Current Density ◽  
High Capacity ◽  
Lithium Ion ◽  
Cycle Performance ◽  
Heated Sample ◽  
Conjugated Microporous Polymer ◽  
Microporous Polymer ◽  
Ion Storage ◽  
First Time

Here we synthesized a 2D π-conjugated microporous polymer NGA-CMP. Heated sample NGA-CMP400 is used for the first time as an anode for LIBs and shows high capacity lithium-ion storage with excellent cycle performance at high current density.

NiFe saponite as a new anode material for high-performance lithium-ion batteries

2020 ◽  
Vol 8 (14) ◽  
pp. 6539-6545
Author(s):  
Jian Zhang ◽  
Qing Yin ◽  
Jianeng Luo ◽  
Jingbin Han ◽  
Lirong Zheng ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
Discharge Density ◽  
A Charge ◽  
First Time ◽  
Charge Discharge

NiFe saponite was discovered for the first time as a new anode material for high-performance lithium-ion batteries, delivering a high capacity of 646 mA h g−1 after 1000 cycles with a charge/discharge density of 500 mA g−1.

Graphene-wrapped mesoporous MnCO3 single crystals synthesized by a dynamic floating electrodeposition method for high performance lithium-ion storage

2015 ◽  
Vol 3 (27) ◽  
pp. 14126-14133 ◽  
Author(s):  
Mingwen Gao ◽  
Xinwei Cui ◽  
Renfei Wang ◽  
Tianfei Wang ◽  
Weixing Chen
Keyword(s):  
Single Crystals ◽  
High Performance ◽  
High Capacity ◽  
Lithium Ion ◽  
Cycling Performance ◽  
Electrodeposition Method ◽  
Ion Storage

Graphene-wrapped MnCO3 MSCs, synthesized through dynamic floating electrodeposition, demonstrate high capacity (1087 mA h g−1) and excellent cycling performance (>400 cycles).

scholarly journals Ceramic-Coated Separator to Enhance Cycling Performance of Lithium-ion Batteries at High Current Density

2021 ◽  
Vol 59 (11) ◽  
pp. 813-820
Author(s):  
Kyusang Cho ◽  
Chandran Balamurugan ◽  
Hana Im ◽  
Hyeong-Jin Kim
Keyword(s):  
Solid Electrolyte ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Electrochemical Impedance ◽  
High Current Density ◽  
Solid Electrolyte Interphase ◽  
Lithium Ion ◽  
Green Energy ◽  
Cycle Performance ◽  
Polypropylene Separator

Given the global demand for green energy, the battery industry is positioned to be an important future technology. Lithium-ion batteries (LIBs), which are the most widely used battery in the market, are the focus of various research and development efforts, from materials to systems, that seek to improve their performance. The separator is one of the core materials in LIBs and is a significant factor in the lifespan of high-performance batteries. To improve the performance of present LIBs, electrochemical testing and related surface analyses of the separator is essential. In this paper, we prepared a ceramic (Boehmite, γ-AlOOH) coated polypropylene separator and a porous polyimide separator to compare their electrochemical properties with a commercialized polypropylene (PP) separator. The prepared separators were assembled into nickelmanganese-cobalt (NMC) cathode half-cell and full-cell lithium-ion batteries. Their cycling performances were evaluated using differential capacity and electrochemical impedance spectroscopy with ethylene carbonate:dimethylcarbonate (EC:DMC) electrolyte. The ceramic coated polypropylene separator exhibited the best cycle performance at a high 5 C rate, with high ionic conductivity and less resistive solid electrolyte interphase. Also, it was confirmed that a separator solid electrolyte interface (SSEI) layer formed on the separator with cycle repetition, and it was also confirmed that this phenomenon determined the cycle life of the battery depending on the electrolyte.

Iron vacancies engineering of FexC@NC hybrids toward enhanced lithium-ion storage properties

2021 ◽  
Author(s):  
Shenghong Liu ◽  
Wenrui Zheng ◽  
Mingyue Huang ◽  
Yaning Xu ◽  
Wenhe Xie ◽  
...  
Keyword(s):  
Active Sites ◽  
High Performance ◽  
Specific Capacity ◽  
Iron Carbide ◽  
High Capacity ◽  
Lithium Ion ◽  
Hierarchical Pores ◽  
Ion Storage ◽  
Energy Storage Properties ◽  
Storage Properties

Abstract Defect engineering have profound influence on the energy storage properties of electrode hybrids by adjusting their intrinsic electronic characteristics. For iron carbide based materials, however, the effect of defect (especially cation vacancies) toward their electrochemical performance are still unclear. Herein, the feasible and scalable synthesis of FexC@NC with 3D honeycomb-like carbon architecture and abundant Fe vacancies via template etching is reported. Such structure enable outstanding lithium-ion storage properties owing to hierarchical pores, improved intrinsic electrochemical activity, as well as the introduction of more active sites. As a result, the FexC@NC-2 presents a high reversible specific capacity of 1079 mAh g−1 after 1000 cycles. Moreover, an excellent cycling stability can be achieved via maintaining a high-capacity retention (689 mAh g−1, 98.4%) over 1000 cycles at 5 A g−1. This study provides a feasible strategy for developing high-performance hybrids with hierarchical pore and rich defects structures.

scholarly journals Sulfur-Doped Graphdiyne as a High-Capacity Anode Material for Lithium-Ion Batteries

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1161
Author(s):  
Fanan Kong ◽  
Yong Yue ◽  
Qingyin Li ◽  
Shijie Ren
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Modular Design ◽  
High Current Density ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Fast Diffusion ◽  
Main Challenge

Heteroatom doping is regarded as a promising approach to enhance the electrochemical performance of carbon materials, while the poor controllability of heteroatoms remains the main challenge. In this context, sulfur-doped graphdiyne (S-GDY) was successfully synthesized on the surface of copper foil using a sulfur-containing multi-acetylene monomer to form a uniform film. The S-GDY film possesses a porous structure and abundant sulfur atoms decorated homogeneously in the carbon skeleton, which facilitate the fast diffusion and storage of lithium ions. The lithium-ion batteries (LIBs) fabricated with S-GDY as anode exhibit excellent performance, including the high specific capacity of 920 mA h g−1 and superior rate performances. The LIBs also show long-term cycling stability under the high current density. This result could potentially provide a modular design principle for the construction of high-performance anode materials for lithium-ion batteries.

Facile approach to thin polypyrrole encapsulation of lamellar iron (II) selenide with much improved performance for lithium-ion storage

2020 ◽  
Vol 13 (08) ◽  
pp. 2050041
Author(s):  
Yue Wang ◽  
Jiangcun Li ◽  
Xusheng Wang ◽  
Chao Wang ◽  
Jitao Chen
Keyword(s):  
Electrochemical Performance ◽  
Discharge Capacity ◽  
High Performance ◽  
High Current Density ◽  
Rate Capability ◽  
Lithium Ion ◽  
Simple Method ◽  
Ion Storage ◽  
Improved Performance ◽  
Enhanced Electrochemical Performance

A facile approach is developed to fabricate polypyrrole-encapsulated lamellar iron (II) selenide (FeSe/PPy) by directly exposing FeSe to pyrrole atmosphere at room temperature. A high FeSe loading of 97 wt.% is achieved for the FeSe/PPy composite, which is designed as an anode for lithium-ion battery (LIB) with much enhanced electrochemical performance than that of the FeSe sample. The FeSe/PPy electrodes demonstrate a reversible discharge capacity of 274 mAh g[Formula: see text] after 50 cycles at a high current density of 0.5 A g[Formula: see text], whereas the lower discharge capacity of 124 mAh g[Formula: see text] for the FeSe electrodes. The FeSe/PPy electrodes also deliver greater rate capability compared to the FeSe electrodes. The improved electrochemical performance should be assigned to the contributions of fast charge transfer and structural defense from the encapsulated PPy. Hence, the FeSe/PPy composite could serve the purpose for constructing reliable anode for LIB, and the simple method of PPy coating can also be used to build high-performance electrodes for other battery systems.

Pyrene-Based Conjugated Microporous Polymer as High Performance Electrode for Lithium-Ion Batteries

2018 ◽  
Vol 76 (3) ◽  
pp. 202 ◽  
Author(s):  
Qian He ◽  
Chong Zhang ◽  
Xiao Li ◽  
Xue Wang ◽  
Pan Mu ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Conjugated Microporous Polymer ◽  
Microporous Polymer

Silicon-nanoparticles isolated by in situ grown polycrystalline graphene hollow spheres for enhanced lithium-ion storage

2015 ◽  
Vol 3 (15) ◽  
pp. 7810-7821 ◽  
Author(s):  
Juan Zhang ◽  
Li Zhang ◽  
Peng Xue ◽  
Liya Zhang ◽  
Xianlin Zhang ◽  
...  
Keyword(s):  
Hollow Sphere ◽  
High Performance ◽  
Silicon Nanoparticles ◽  
Hollow Spheres ◽  
Lithium Ion ◽  
Si Nanoparticle ◽  
Ion Storage ◽  
Li Ion ◽  
First Time

Graphene hollow sphere isolated Si nanoparticle nanocomposites arein situsynthesized for the first time and used as high-performance Li-ion anodes.

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