Two π‐Conjugated Covalent Organic Frameworks with Long‐Term Cyclability at High Current Density for Lithium Ion Battery

2019 ◽  
Vol 25 (68) ◽  
pp. 15472-15476 ◽  
Author(s):  
Heng Chen ◽  
Yadi Zhang ◽  
Chengyang Xu ◽  
Mufan Cao ◽  
Hui Dou ◽  
...  
Keyword(s):  
Lithium Ion Battery ◽  
Current Density ◽  
High Current Density ◽  
Lithium Ion ◽  
Covalent Organic Frameworks ◽  
High Current

High interfacial storage capability of porous NiMn2O4/C hierarchical tremella-like nanostructures as the lithium ion battery anode

Nanoscale ◽  
2015 ◽  
Vol 7 (1) ◽  
pp. 225-231 ◽  
Author(s):  
Wenpei Kang ◽  
Yongbing Tang ◽  
Wenyue Li ◽  
Xia Yang ◽  
Hongtao Xue ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Current Density ◽  
Anode Materials ◽  
High Current Density ◽  
Specific Capacity ◽  
Lithium Ion ◽  
High Current ◽  
High Specific Capacity ◽  
Battery Anode

NiMn2O4/C hierarchical tremella-like nanostructures are facilely prepared and show an ultra-high specific capacity even at high current density as anode materials of lithium ion batteries.

Porous CuCo2O4 nanocubes wrapped by reduced graphene oxide as high-performance lithium-ion battery anodes

Nanoscale ◽  
2014 ◽  
Vol 6 (12) ◽  
pp. 6551-6556 ◽  
Author(s):  
Wenpei Kang ◽  
Yongbing Tang ◽  
Wenyue Li ◽  
Zhangpeng Li ◽  
Xia Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lithium Ion Battery ◽  
Reduced Graphene Oxide ◽  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Lithium Ion ◽  
High Current ◽  
Reduced Graphene ◽  
Graphene Oxide Sheets

Porous CuCo2O4 nanocubes well wrapped by reduced graphene oxide sheets were facilely prepared and they showed impressive performance at high current density as the anode material of a lithium ion battery.

On-site evolution of ultrafine ZnO nanoparticles from hollow metal–organic frameworks for advanced lithium ion battery anodes

2017 ◽  
Vol 5 (43) ◽  
pp. 22512-22518 ◽  
Author(s):  
Yiqiong Zhang ◽  
Yanbing Lu ◽  
Shi Feng ◽  
Dongdong Liu ◽  
Zhaoling Ma ◽  
...  
Keyword(s):  
Current Density ◽  
Zno Nanoparticles ◽  
High Current Density ◽  
Metal Organic Frameworks ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Cycling Performance ◽  
High Current ◽  
Metal Organic ◽  
Hollow Metal

With unique hollow frameworks decorated with well-dispersed ultrafine ZnO nanoparticles, the h-ZIF-8@ZnO hybrids exhibit good cycling performance with a reversible capacity of ∼637.9 mA h g−1 at a high current density of 1.0 A g−1 after 500 cycles.

scholarly journals Effect of Prelithiation Process for Hard Carbon Negative Electrode on the Rate and Cycling Behaviors of Lithium-Ion Batteries

Batteries ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 71 ◽  
Author(s):  
Yusuke Abe ◽  
Tomoaki Saito ◽  
Seiji Kumagai
Keyword(s):  
Lithium Ion Batteries ◽  
Current Density ◽  
High Current Density ◽  
Negative Electrode ◽  
Lithium Ion ◽  
High Current ◽  
Hard Carbon ◽  
Li Ion ◽  
Charge Discharge ◽  
Ion Insertion

Two prelithiation processes (shallow Li-ion insertion, and thrice-repeated deep Li-ion insertion and extraction) were applied to the hard carbon (HC) negative electrode (NE) used in lithium-ion batteries (LIBs). LIB full-cells were assembled using Li(Ni0.5Co0.2Mn0.3)O2 positive electrodes (PEs) and the prelithiated HC NEs. The assembled full-cells were charged and discharged under a low current density, increasing current densities in a stepwise manner, and then constant under a high current density. The prelithiation process of shallow Li-ion insertion resulted in the high Coulombic efficiency (CE) of the full-cell at the initial charge-discharge cycles as well as in a superior rate capability. The prelithiation process of thrice-repeated Li-ion insertion and extraction attained an even higher CE and a high charge-discharge specific capacity under a low current density. However, both prelithiation processes decreased the capacity retention during charge-discharge cycling under a high current density, ascertaining a trade-off relationship between the increased CE and the cycling performance. Further elimination of the irreversible capacity of the HC NE was responsible for the higher utilization of both the PE and NE, attaining higher initial performances, but allowing the larger capacity to fade throughout charge-discharge cycling.

scholarly journals N-Doped Carbon Boosted the Formation of Few-Layered MoS2 for High-Performance Lithium and Sodium Storage

2021 ◽  
Vol 8 ◽  
Author(s):  
Junfeng Li ◽  
Xianzi Zhou ◽  
Kai Lu ◽  
Chao Ma ◽  
Liang Li ◽  
...  
Keyword(s):  
Current Density ◽  
High Performance ◽  
High Current Density ◽  
Low Cost ◽  
Lithium Ion ◽  
Reversible Capacity ◽  
Molybdenum Sulfide ◽  
High Current ◽  
High Theoretical Capacity ◽  
Sodium Storage

Molybdenum sulfide (MoS2) has become a potential anode of lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs) due to its high theoretical capacity and low cost. However, the volume expansion, poor electrical conductivity and dissolution of polysulfides in the electrolyte during the cycling process severely limited its applications. Herein, few-layered MoS2@N-doped carbon (F-MoS2@NC) was synthesized through a facile solvothermal and annealing process. It was found that the addition of N-doped carbon precursor could significantly promote the formation of few-layered MoS2 and improve the performances of lithium and sodium storage. A high reversible capacity of 482.6 mA h g−1 at a high current density of 2000 mA g−1 could be obtained for LIBs. When used as anode material for SIBs, F-MoS2@NC hybrids could maintain a reversible capacity of 171 mA h g−1 at a high current density of 1,000 mA g−1 after 600 cycles. This work should provide new insights into carbon hybrid anode materials for both LIBs and SIBs.

Excellent performance of carbon-coated TiO2/Li4Ti5O12 composites with low Li/Ti ratio for Li-ion storage

RSC Advances ◽  
2015 ◽  
Vol 5 (113) ◽  
pp. 93155-93161 ◽  
Author(s):  
Wei Yang ◽  
Xue Bai ◽  
Tao Li ◽  
Yuan-Yuan Ma ◽  
Yong-Xin Qi ◽  
...  
Keyword(s):  
Current Density ◽  
High Current Density ◽  
Cycling Performance ◽  
High Rate ◽  
High Current ◽  
Excellent Performance ◽  
Ion Storage ◽  
Carbon Coated ◽  
Li Ion

Carbon-coated TiO2/Li4Ti5O12 composites with Li : Ti = 4 : 8 display high rate capacities and excellent long-term cycling performance at high current density.

scholarly journals Long-Term Electrically Stable Silver Nanowire Composite Transparent Electrode Under High Current Density

2021 ◽  
Author(s):  
Kaiqing Wang ◽  
Yunxia Jin ◽  
Fei Xiao
Keyword(s):  
Current Density ◽  
Composite Electrode ◽  
High Current Density ◽  
Transparent Electrode ◽  
Silver Nanowire ◽  
Electrical Performance ◽  
High Current ◽  
Electrical Stability ◽  
Current Stress

Abstract Silver nanowire (AgNW) network has been employed to many electronic devices as transparent electrode. However, the poor electrical stability under current has been seriously holding its practical application, and we still lack long-term electrically stable AgNW system to study the underlying fundamental of electrical failure. In this work, the electrical performance and failure mechanism of chitosan-ascorbic acid (Chi-AsA)/AgNW composite under current stress were thoroughly studied. The composite electrode maintained stability above 24000 h under high current density of 100 mA cm-1. The main failure in AgNW composite is found to be a wave break perpendicular to the current rather than traditional uniform degradation across AgNW networks. More interestingly, the AgNWs in failed composite electrode kept their original smooth morphology excepting the crack area, while the AgNWs in pristine networks degraded to nanoparticles or became disconnected everywhere. The patterned AgNW composite in microscale exhibits similar long lifetime in resisting current stress as the bulk composite film. The effect of over-coating position, electrical stress, temperature and over-coating materials on the electrical stability were studied. The over-coating layer of Chi-AsA is proven to suppress the silver atoms from migration, reduce the concentrated Joule heating at junctions, and inhibit the corrosion. The Chi-AsA/AgNW composite enables electrically stable transparent conductor for next-generation optoelectronics, and the mechanism investigation may provide effective means of preparing electrically stable AgNW systems.

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