Current-density dependence of Li2S/Li2S2 growth in lithium–sulfur batteries

2019 ◽  
Vol 12 (10) ◽  
pp. 2976-2982 ◽  
Author(s):  
Long Kong ◽  
Jin-Xiu Chen ◽  
Hong-Jie Peng ◽  
Jia-Qi Huang ◽  
Wancheng Zhu ◽  
...  
Keyword(s):  
Density Dependence ◽  
Current Density ◽  
High Efficiency ◽  
Density Dependent ◽  
Guiding Principle ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur ◽  
Nucleation Growth

The current-density-dependent Li2S1/2 nucleation/growth was explored and this guiding principle was applied for the construction of high-efficiency Li–S batteries.

scholarly journals Lamellar Polypyrene Based on Attapulgite–Sulfur Composite for Lithium–Sulfur Battery

Membranes ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 483
Author(s):  
Jing Wang ◽  
Riwei Xu ◽  
Chengzhong Wang ◽  
Jinping Xiong
Keyword(s):  
Cathode Material ◽  
Current Density ◽  
High Current Density ◽  
Specific Capacity ◽  
Lithium Sulfur Batteries ◽  
Rate Test ◽  
Sulfur Battery ◽  
Lower Capacity ◽  
Lithium Sulfur

We report on the preparation and characterization of a novel lamellar polypyrrole using an attapulgite–sulfur composite as a hard template. Pretreated attapulgite was utilized as the carrier of elemental sulfur and the attapulgite–sulfur–polypyrrole (AT @400 °C–S–PPy) composite with 50 wt.% sulfur was obtained. The structure and morphology of the composite were characterized with infrared spectroscopy (IR), thermogravimetric analysis (TGA), and scanning electron microscopy (SEM). An AT @400 °C–S–PPy composite was further utilized as the cathode material for lithium–sulfur batteries. The first discharge specific capacity of this kind of battery reached 1175 mAh/g at a 0.1 C current rate and remained at 518 mAh/g after 100 cycles with capacity retention close to 44%. In the rate test, compared with the polypyrrole–sulfur (PPy–S) cathode material, the AT @400 °C–S–PPy cathode material showed lower capacity at a high current density, but it showed higher capacity when the current came back to a low current density, which was attributed to the “recycling” of pores and channels of attapulgite. Therefore, the lamellar composite with special pore structure has great value in improving the performance of lithium–sulfur batteries.

scholarly journals Three-Dimensionally Ordered Macroporous ZnO Framework as Dual-Functional Sulfur Host for High-Efficiency Lithium–Sulfur Batteries

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2267
Author(s):  
Haisheng Han ◽  
Tong Wang ◽  
Yongguang Zhang ◽  
Arailym Nurpeissova ◽  
Zhumabay Bakenov
Keyword(s):  
High Efficiency ◽  
High Capacity ◽  
Active Surface ◽  
Active Surface Area ◽  
Shuttle Effect ◽  
Dual Functional ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Ordered Macroporous ◽  
Lithium Sulfur

A three-dimensionally ordered macroporous ZnO (3DOM ZnO) framework was synthesized by a template method to serve as a sulfur host for lithium–sulfur batteries. The unique 3DOM structure along with an increased active surface area promotes faster and better electrolyte penetration accelerating ion/mass transfer. Moreover, ZnO as a polar metal oxide has a strong adsorption capacity for polysulfides, which makes the 3DOM ZnO framework an ideal immobilization agent and catalyst to inhibit the polysulfides shuttle effect and promote the redox reactions kinetics. As a result of the stated advantages, the S/3DOM ZnO composite delivered a high initial capacity of 1110 mAh g−1 and maintained a capacity of 991 mAh g−1 after 100 cycles at 0.2 C as a cathode in a lithium–sulfur battery. Even at a high C-rate of 3 C, the S/3DOM ZnO composite still provided a high capacity of 651 mAh g−1, as well as a high areal capacity (4.47 mAh cm−2) under high loading (5 mg cm−2).

scholarly journals Encapsulating Sulfur Into Nickel Decorated Hollow Carbon Fibers for High-Performance Lithium-Sulfur Batteries

2021 ◽  
Vol 8 ◽  
Author(s):  
Dongdong Yu ◽  
Zhihong Tang ◽  
Haiyong He
Keyword(s):  
Carbon Fibers ◽  
Current Density ◽  
Specific Capacity ◽  
Energy Storage Devices ◽  
Transport Channel ◽  
Nickel Particles ◽  
Study Results ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Lithium Sulfur

Due to the high specific energy density, lithium-sulfur batteries (LSBs) have great potential in energy storage devices for electric vehicle and electronic equipment. However, poor conductivity of sulfur, large volume expansion, and lithium polysulfide dissolution limit LSBs application and promotion. In this work, graphitic hollow carbon fibers (HCF) were fabricated as a matrix to encapsulate sulfur. And nickel particles were introduced into fibers (Ni@HCF) to improve the cycle stability of sulfur cathode. On one hand, hollow structures can encapsulate sulfur and limit lithium polysulfides dissolution, and the graphitic carbon walls can provide a fast electron transport channel. On the other hand, nickel particles can accelerate the conversion of lithium polysulfides. The study results show that the initial discharge specific capacity of Ni@HCF/S cathodes reaches 1,252 mAh g−1 at the current density of 0.1C. And the capacity can be maintained at 558 mAh g−1 after 200 cycles at the current density of 1C.

High Efficiency, Low Polysulfides Solubility Electrolytes for Lithium Sulfur Batteries

2021 ◽  
Vol MA2021-02 (1) ◽  
pp. 53-53
Author(s):  
Xia Cao ◽  
Lili Shi ◽  
Dongping Lu ◽  
Jie Xiao ◽  
Jun Liu ◽  
...  
Keyword(s):  
High Efficiency ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

SnO2as a high-efficiency polysulfide trap in lithium–sulfur batteries

Nanoscale ◽  
2016 ◽  
Vol 8 (28) ◽  
pp. 13638-13645 ◽  
Author(s):  
Jing Liu ◽  
Lixia Yuan ◽  
Kai Yuan ◽  
Zhen Li ◽  
Zhangxiang Hao ◽  
...  
Keyword(s):  
High Efficiency ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur

Covalent Organic Frameworks as the Coating Layer of Ceramic Separator for High-Efficiency Lithium–Sulfur Batteries

2017 ◽  
Vol 1 (1) ◽  
pp. 132-138 ◽  
Author(s):  
Jianyi Wang ◽  
Liping Si ◽  
Qin Wei ◽  
Xujia Hong ◽  
Songliang Cai ◽  
...  
Keyword(s):  
High Efficiency ◽  
Coating Layer ◽  
Covalent Organic Frameworks ◽  
Lithium Sulfur Batteries ◽  
Lithium Sulfur
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