scholarly journals Rational Design of Porous N-Ti3C2 MXene@CNT Microspheres for High Cycling Stability in Li–S Battery

2019 ◽  
Vol 12 (1) ◽  
Author(s):  
Jianli Wang ◽  
Zhao Zhang ◽  
Xufeng Yan ◽  
Shunlong Zhang ◽  
Zihao Wu ◽  
...  
Keyword(s):  
Rational Design ◽  
Specific Capacity ◽  
High Capacity ◽  
Cycling Stability ◽  
Chemical Immobilization ◽  
Carbon And Nitrogen ◽  
N Doping ◽  
Sulfur Host ◽  
Fading Rate

Abstract Herein, N-Ti3C2@CNT microspheres are successfully synthesized by the simple spray drying method. In the preparation process, HCl-treated melamine (HTM) is selected as the sources of carbon and nitrogen. It not only realizes in situ growth of CNTs on the surface of MXene nanosheets with the catalysis of Ni, but also introduces efficient N-doping in both MXene and CNTs. Within the microsphere, MXene nanosheets interconnect with CNTs to form porous and conductive network. In addition, N-doped MXene and CNTs can provide strong chemical immobilization for polysulfides and effectively entrap them within the porous microspheres. Above-mentioned merits enable N-Ti3C2@CNT microspheres to be ideal sulfur host. When used in lithium–sulfur (Li–S) battery, the N-Ti3C2@CNT microspheres/S cathode delivers initial specific capacity of 927 mAh g−1 at 1 C and retains high capacity of 775 mAh g−1 after 1000 cycles with extremely low fading rate (FR) of 0.016% per cycle. Furthermore, the cathode still shows high cycling stability at high C-rate of 4 C (capacity of 647 mAh g−1 after 650 cycles, FR 0.027%) and high sulfur loading of 3 and 6 mg cm−2 for Li–S batteries.

scholarly journals Wire-in-Wire TiO2/C Nanofibers Free-Standing Anodes for Li-Ion and K-Ion Batteries with Long Cycling Stability and High Capacity

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Die Su ◽  
Yi Pei ◽  
Li Liu ◽  
Zhixiao Liu ◽  
Junfang Liu ◽  
...  
Keyword(s):  
Critical Role ◽  
Electronic Conductivity ◽  
Specific Capacity ◽  
High Capacity ◽  
Cycling Stability ◽  
Free Standing ◽  
High Specific Capacity ◽  
Tetracarboxylic Dianhydride ◽  
Carbon Network

AbstractWearable and portable mobile phones play a critical role in the market, and one of the key technologies is the flexible electrode with high specific capacity and excellent mechanical flexibility. Herein, a wire-in-wire TiO2/C nanofibers (TiO2 ww/CN) film is synthesized via electrospinning with selenium as a structural inducer. The interconnected carbon network and unique wire-in-wire nanostructure cannot only improve electronic conductivity and induce effective charge transports, but also bring a superior mechanic flexibility. Ultimately, TiO2 ww/CN film shows outstanding electrochemical performance as free-standing electrodes in Li/K ion batteries. It shows a discharge capacity as high as 303 mAh g−1 at 5 A g−1 after 6000 cycles in Li half-cells, and the unique structure is well-reserved after long-term cycling. Moreover, even TiO2 has a large diffusion barrier of K+, TiO2 ww/CN film demonstrates excellent performance (259 mAh g−1 at 0.05 A g−1 after 1000 cycles) in K half-cells owing to extraordinary pseudocapacitive contribution. The Li/K full cells consisted of TiO2 ww/CN film anode and LiFePO4/Perylene-3,4,9,10-tetracarboxylic dianhydride cathode possess outstanding cycling stability and demonstrate practical application from lighting at least 19 LEDs. It is, therefore, expected that this material will find broad applications in portable and wearable Li/K-ion batteries.

Novel melamine-based porous organic polymers: synthesis, characterizations, morphology modifications, and their applications in lithium-sulfur batteries

2021 ◽  
Author(s):  
Haiyang Liu ◽  
Jiaxing Wang ◽  
Miao SUN ◽  
Yu Wang ◽  
Runing Zhao ◽  
...  
Keyword(s):  
High Performance ◽  
Rational Design ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Organic Polymer ◽  
Energy Storage Devices ◽  
Shuttle Effect ◽  
Physical Constraints ◽  
Lithium Sulfur

Abstract Lithium-sulfur (Li-S) batteries have been considered to be one of the most promising energy storage devices in the next generation. However, the insulating properties of sulfur and the shuttle effect of soluble lithium polysulfides (LiPSs) seriously hinder the practical application of Li-S batteries. In this paper, a novel porous organic polymer (HUT3) was prepared based on the polycondensation between melamine and 1,4-phenylene diisocyanate. The micro morphology of HUT3 was improved by in-situ growth on different mass fractions of rGO (5%, 10%, 15%), and the obtained HUT3-rGO composites were employed as sulfur carriers in Li-S batteries with promoted the sulfur loading ratio and lithium ion mobility. Attributed to the synergistic effect of the chemisorption of polar groups and the physical constraints of HUT3 structure, HUT3-rGO/S electrodes exhibits excellent capacity and cyclability performance. For instance, HUT3-10rGO/S electrode exhibits a high initial specific capacity of 950 mAh g-1 at 0.2 C and retains a high capacity of 707 mAh g-1 after 500 cycles at 1 C. This work emphasizes the importance of the rational design of the chemical structure and opens up a simple way for the development of cathode materials suitable for high-performance Li-S batteries.

Co2P nanoparticles encapsulated in 3D porous N-doped carbon nanosheet networks as an anode for high-performance sodium-ion batteries

2018 ◽  
Vol 6 (5) ◽  
pp. 2139-2147 ◽  
Author(s):  
Dan Zhou ◽  
Li-Zhen Fan
Keyword(s):  
High Performance ◽  
Specific Capacity ◽  
Rate Capability ◽  
Cobalt Nitrate ◽  
Cycling Stability ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
High Specific Capacity

A novel Co2P-3D PNC composite with Co2P NPs encapsulated in 3D porous N-doped carbon nanosheet networks was synthesized by a cobalt nitrate-induced PVP-blowing method combined with an in situ phosphidation process. The resultant Co2P-3D PNC anode delivers high specific capacity, enhanced rate capability, and improved cycling stability.

An in situ self-developed graphite as high capacity anode of lithium-ion batteries

2015 ◽  
Vol 51 (60) ◽  
pp. 12118-12121 ◽  
Author(s):  
Mengyao Gao ◽  
Naiqiang Liu ◽  
Yilei Chen ◽  
Yuepeng Guan ◽  
Weikun Wang ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Lithium Ion Battery ◽  
Specific Capacity ◽  
High Capacity ◽  
Lithium Ion ◽  
Battery Anode

Graphite with a large inter-planar distance (0.357 nm), obtained from pig bone, delivered an continuously improving specific capacity when used as a lithium-ion battery anode.

Nanoporous gyroid Ni/NiO/C nanocomposites from block copolymer templates with high capacity and stability for lithium storage

2018 ◽  
Vol 6 (28) ◽  
pp. 13676-13684 ◽  
Author(s):  
Chung-Fu Cheng ◽  
Yu-Ming Chen ◽  
Feng Zou ◽  
Kai-Chieh Yang ◽  
Tzu-Ying Lin ◽  
...  
Keyword(s):  
Block Copolymer ◽  
Specific Capacity ◽  
High Capacity ◽  
Cycling Stability ◽  
Lithium Storage ◽  
Good Cycling Stability ◽  
Nanocomposite Electrodes

Nanoporous gyroid Ni/NiO/C nanocomposite electrodes exhibited good cycling stability over 1000 cycles at 1 A g−1 with a specific capacity of 800 mA h g−1.

Origin of High Capacity and Poor Cycling Stability of Li-Rich Layered Oxides: A Long-Duration in Situ Synchrotron Powder Diffraction Study

2018 ◽  
Vol 30 (11) ◽  
pp. 3656-3667 ◽  
Author(s):  
Karin Kleiner ◽  
Benjamin Strehle ◽  
Annabelle R. Baker ◽  
Sarah J. Day ◽  
Chiu C. Tang ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Powder Diffraction ◽  
High Capacity ◽  
Cycling Stability ◽  
Layered Oxides ◽  
Synchrotron Powder Diffraction ◽  
Long Duration

Zinc ion stabilized MnO2 nanospheres for high capacity and long lifespan aqueous zinc-ion batteries

2019 ◽  
Vol 7 (22) ◽  
pp. 13727-13735 ◽  
Author(s):  
Jinjin Wang ◽  
Jian-Gan Wang ◽  
Huanyan Liu ◽  
Chunguang Wei ◽  
Feiyu Kang
Keyword(s):  
Specific Capacity ◽  
High Capacity ◽  
Zinc Ion ◽  
Cycling Stability ◽  
High Specific Capacity ◽  
Stabilized Mno ◽  
Superior Cycling Stability

Zinc ion stabilized MnO2 nanospheres with a flower-like morphology and mesoporous texture are prepared, and they show high specific capacity and superior cycling stability for Zn-ion batteries.

Flower-like polyaniline–NiO structures: a high specific capacity supercapacitor electrode material with remarkable cycling stability

RSC Advances ◽  
2016 ◽  
Vol 6 (50) ◽  
pp. 43959-43963 ◽  
Author(s):  
Bangning Sun ◽  
Xinping He ◽  
Xijin Leng ◽  
Yang Jiang ◽  
Yudong Zhao ◽  
...  
Keyword(s):  
Electrode Material ◽  
Nickel Foam ◽  
Specific Capacity ◽  
Cycling Stability ◽  
Supercapacitor Electrode ◽  
High Specific Capacity ◽  
Binder Free

In this study, we report a binder-free in situ approach to synthesize a polyaniline–NiO composite on a nickel foam as a supercapacitor electrode.

High-capacity sulfur copolymer cathode with metallic fibril-based current collector and conductive capping layer

2021 ◽  
Vol 9 (4) ◽  
pp. 2334-2344
Author(s):  
Dongyeeb Shin ◽  
Yongkwon Song ◽  
Donghyeon Nam ◽  
Jun Hyuk Moon ◽  
Seung Woo Lee ◽  
...  
Keyword(s):  
Specific Capacity ◽  
High Capacity ◽  
Rate Capability ◽  
Current Collector ◽  
Interfacial Interaction ◽  
Cycling Stability ◽  
Capping Layer

We report a sulfur copolymer cathode with high areal/specific capacity, rate capability, and cycling stability using carbonization-induced Ni electroplating and interfacial interaction-controlled conductive capping layer.

scholarly journals A spheres-in-tube carbonaceous nanostructure for high-capacity and high-rate lithium–sulfur batteries

2018 ◽  
Vol 6 (30) ◽  
pp. 14885-14893 ◽  
Author(s):  
Yuanhang Ge ◽  
Ze Chen ◽  
Sunjie Ye ◽  
Zhifeng Zhu ◽  
Yingfeng Tu ◽  
...  
Keyword(s):  
High Capacity ◽  
Reversible Capacity ◽  
Cycling Stability ◽  
High Rate ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Good Cycling Stability ◽  
Lithium Sulfur

A spheres-in-tube carbonaceous nanostructure has been prepared as an effective sulfur host, exhibiting large reversible capacity and good cycling stability.

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