Effect of Cross-Sectional Shape of Pathway on Ion Migration in Polyethylene Separators for Lithium-Ion Batteries

2019 ◽  
Vol 124 (3) ◽  
pp. 1827-1835 ◽  
Author(s):  
Sahori Takeda ◽  
Yuria Saito ◽  
Ikue Kaneko ◽  
Hideya Yoshitake
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Cross Sectional ◽  
Ion Migration ◽  
Sectional Shape

scholarly journals Utilizing the Intrinsic Thermal Instability of Swedenborgite Structured YBaCo4O7+δ as an Opportunity for Material Engineering in Lithium-Ion Batteries by Er and Ga Co-Doping Processes

Materials ◽  
2021 ◽  
Vol 14 (16) ◽  
pp. 4565
Author(s):  
Sanghyuk Park ◽  
Kwangho Park ◽  
Ji-Seop Shin ◽  
Gyeongbin Ko ◽  
Wooseok Kim ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Phase Stability ◽  
Electrochemical Impedance ◽  
Coulombic Efficiency ◽  
Structural Phase ◽  
Active Material ◽  
Rate Capability ◽  
Lithium Ion ◽  
Ion Migration ◽  
Co Doping

We firstly introduce Er and Ga co-doped swedenborgite-structured YBaCo4O7+δ (YBC) as a cathode-active material in lithium-ion batteries (LIBs), aiming at converting the phase instability of YBC at high temperatures into a strategic way of enhancing the structural stability of layered cathode-active materials. Our recent publication reported that Y0.8Er0.2BaCo3.2Ga0.8O7+δ (YEBCG) showed excellent phase stability compared to YBC in a fuel cell operating condition. By contrast, the feasibility of the LiCoO2 (LCO) phase, which is derived from swedenborgite-structured YBC-based materials, as a LIB cathode-active material is investigated and the effects of co-doping with the Er and Ga ions on the structural and electrochemical properties of Li-intercalated YBC are systemically studied. The intrinsic swedenborgite structure of YBC-based materials with tetrahedrally coordinated Co2+/Co3+ are partially transformed into octahedrally coordinated Co3+, resulting in the formation of an LCO layered structure with a space group of R-3m that can work as a Li-ion migration path. Li-intercalated YEBCG (Li[YEBCG]) shows effective suppression of structural phase transition during cycling, leading to the enhancement of LIB performance in Coulombic efficiency, capacity retention, and rate capability. The galvanostatic intermittent titration technique, cyclic voltammetry and electrochemical impedance spectroscopy are performed to elucidate the enhanced phase stability of Li[YEBCG].

Covalent organic framework-regulated ionic transportation for high-performance lithium-ion batteries

2019 ◽  
Vol 7 (46) ◽  
pp. 26540-26548 ◽  
Author(s):  
Yucheng Wen ◽  
Xianshu Wang ◽  
Yan Yang ◽  
Mingzhu Liu ◽  
Wenqiang Tu ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Ions ◽  
Lithium Ion Batteries ◽  
High Performance ◽  
Lithium Ion ◽  
Transition Metal Ions ◽  
Ion Migration ◽  
Covalent Organic Framework ◽  
Polymer Separator ◽  
Organic Framework

A polymer separator modified with a covalent organic framework can effectively accelerate lithium ion migration and immobilize transition metal ions.

A brand-new bimetallic copper-lithium HEDP complex of fast ion migration as a promising anode for lithium ion batteries

2020 ◽  
Vol 1214 ◽  
pp. 128223 ◽  
Author(s):  
Guang-Xin Pan ◽  
Yu-Hang Zhang ◽  
Ping-Ping Sun ◽  
Xuehua Yu ◽  
Jun Gao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion ◽  
Ion Migration ◽  
Fast Ion

scholarly journals TiO2 Hollow Spheres With Flower-Like SnO2 Shell as Anodes for Lithium-Ion Batteries

2021 ◽  
Vol 9 ◽  
Author(s):  
Ying Weng ◽  
Ziying Zhang ◽  
Huizhen Zhang ◽  
Yangyang Zhou ◽  
Xiaona Zhao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Specific Capacity ◽  
Hollow Spheres ◽  
Lithium Ion ◽  
Mesoporous Structure ◽  
Cycling Performance ◽  
Commercial Application ◽  
Ion Migration ◽  
Current Densities ◽  
Tio2 Hollow Spheres

SnO2 is a promising anode material for lithium-ion batteries due to its high theoretical specific capacity and low operation voltage. However, its poor cycling performance hinders its commercial application. In order to improve the cycling stability of SnO2 electrodes, novel flower-like SnO2/TiO2 hollow spheres were prepared by facile hydrothermal method using carbon spheres as templates. Their flower-like shell and mesoporous structure highlighted a large specific surface area and excellent ion migration performance. Their TiO2 hollow sphere matrix and 2D SnO2 nano-flakes ensured good cycle stability. The electrochemical measurements indicated that novel flower-like SnO2/TiO2 hollow spheres delivered a high specific capacity, low irreversible capacity loss and superior rate performance. After 1,000 cycles at current densities of 200 mA g−1, the capacity of the flower-like SnO2/TiO2 hollow spheres was still maintained at 720 mAh g−1. Their rate capacity reached 486 mAh g−1 when the current densities gradually increase to 2,000 mA g−1.

On the cross-sectional shape of the cellulose crystallites in the tunicate Halocynthia papillosa

1990 ◽  
Vol 48 (3) ◽  
pp. 566-567
Author(s):  
J.-F. Revol ◽  
Y. Van Daele ◽  
F. Gaill
Keyword(s):  
Contrast Imaging ◽  
Animal Kingdom ◽  
Bright Field ◽  
Field Mode ◽  
Cross Sectional ◽  
Ultrathin Sections ◽  
The Cross ◽  
Sectional Shape ◽  
Valonia Ventricosa ◽  
C Nmr

The only form of cellulose which could unequivocally be ascribed to the animal kingdom is the tunicin that occurs in the tests of the tunicates. Recently, high-resolution solid-state l3C NMR revealed that tunicin belongs to the Iβ form of cellulose as opposed to the Iα form found in Valonia and bacterial celluloses. The high perfection of the tunicin crystallites led us to study its crosssectional shape and to compare it with the shape of those in Valonia ventricosa (V.v.), the goal being to relate the cross-section of cellulose crystallites with the two allomorphs Iα and Iβ.In the present work the source of tunicin was the test of the ascidian Halocvnthia papillosa (H.p.). Diffraction contrast imaging in the bright field mode was applied on ultrathin sections of the V.v. cell wall and H.p. test with cellulose crystallites perpendicular to the plane of the sections. The electron microscope, a Philips 400T, was operated at 120 kV in a low intensity beam condition.

CuS2 sheets: a hidden anode material with a high capacity for sodium-ion batteries

2021 ◽  
Author(s):  
Shaohua Lu ◽  
Weidong Hu ◽  
Xiaojun Hu
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Low Cost ◽  
High Capacity ◽  
Lithium Ion ◽  
Sodium Ion ◽  
Sodium Ion Batteries

Due to their low cost and improved safety compared to lithium-ion batteries, sodium-ion batteries have attracted worldwide attention in recent decades.

Synthesis and study of carbon nanostructured additives for lithium-ion batteries

2018 ◽  
Vol 125 (4) ◽  
pp. 8-13
Author(s):  
А.Б. Абдрахманова ◽  
◽  
В. А. Кривченко ◽  
Н. М. Омарова
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion
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