scholarly journals Mn-N-C Nanostructure Derived from MnO2-x/PANI as Highly Performing Cathode Additive in Li-S Battery

Reactions ◽  
2021 ◽  
Vol 2 (3) ◽  
pp. 275-286
Author(s):  
Xingyuan Gao ◽  
Ruliang Liu ◽  
Lixia Wu ◽  
Changdi Lai ◽  
Yubin Liang ◽  
...  
Keyword(s):  
Metallic Nanoparticles ◽  
Active Sites ◽  
In Situ Polymerization ◽  
Specific Capacity ◽  
Carbon Matrix ◽  
Rate Performance ◽  
Highly Dispersed ◽  
Good Cycling Stability ◽  
Cathode Additive

Highly dispersed Mn metallic nanoparticles (15.87 nm on average) on a nitrogen-doped porous carbon matrix were prepared by thermal treatment of MnO2-x/polyaniline (PANI), which was derived from the in situ polymerization of aniline monomers initiated by γ-MnO2 nanosheets. Owing to the large surface area (1287 m2/g), abundant active sites, nitrogen dopants and highly dispersed Mn sites on graphitic carbon, an impressive specific capacity of 1319.4 mAh g−1 with an admirable rate performance was delivered in a Li-S battery. After 220 cycles at 1 C, 80.6% of the original capacity was retained, exhibiting a good cycling stability.

scholarly journals One-step vapor-pressured induced synthesis of spherical-like Co9S8/N, S-codoped carbon nanocomposites with superior rate capability as lithium-ion-battery anode

2021 ◽  
Vol 261 ◽  
pp. 02048
Author(s):  
Jiayang Li ◽  
Zhenwei Li ◽  
Meisheng Han
Keyword(s):  
Electrical Conductivity ◽  
Active Sites ◽  
Specific Capacity ◽  
High Capacity ◽  
Rate Capability ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Reversible Capacity ◽  
Rate Performance ◽  
Carbon Nanocomposites

As high theoretical capacity and excellent electrical conductivity, Co9S8 as a promising electrode material in lithium-ion batteries (LIBs) has attracted wide attention. In the present work, a simple vaporpressured induced route is developed for fabricating spherical-like Co9S8/N, S-codoped carbon nanocomposites (Co9S8/NSC), in which Co9S8 nanoparticles with an average size of 100 nm are encapsulated into N, S-codoped carbon matrix, by pyrolysis of mixture of cobalt isooctanoate dissolved into dimethylformamide and thiourea in a sealed vessel for the first time. As anode for LIBs, the Co9S8/NSC shows an excellent reversible capacity, a superior rate performance, and a long cycling stability. For example, a high capacity of 975.3 mA h g-1 can be achieved after 100 cycles at 0.1 A g-1. When cycled at 1 A g-1, it also maintains a high specific capacity of 791.5 mA h g-1 after 1000 cycles. Besides, it also shows a superior rate performance (329.8 mAh g-1 at 20 A g-1). Such superior performances may arise from its structural advantages that the smaller Co9S8 nanoparticles encapsulated into N, S-codoped carbon could enhance active sites, electrical conductivity, and structural stability.

Facile Synthesis and Electrochemical Characterization of PbO@C Nanocomposites

2012 ◽  
Vol 268-270 ◽  
pp. 189-192
Author(s):  
Chao Yang Liu ◽  
Jian Guo Yu ◽  
Jun Qin Fan ◽  
Yong Nan Zhao ◽  
Xu Fei Xue
Keyword(s):  
Specific Capacity ◽  
Carbon Matrix ◽  
Nitrogen Atmosphere ◽  
Particle Sizes ◽  
Facile Synthesis ◽  
Discharge Current Density ◽  
High Specific Capacity ◽  
Electrochemical Tests ◽  
Highly Dispersed

PbO@C nanocomposites were synthesized by soaking maize in Pb(NO3)2 solutions followed by calcination in nitrogen atmosphere. TEM photos showed highly dispersed PbO nanoparticles homogeneously embedded in the carbon matrix and the main particle sizes of PbO were distributed between 15-29 nm. Electrochemical tests revealed a high specific capacity of 152.6 Fg-1 and good stability at discharge current density of 1.0 Ag-1.

The preparation of modified boehmite/PMMA nanocomposites by in situ polymerization and the assessment of their capability for Cu2+ ion removal

2016 ◽  
Vol 40 (4) ◽  
pp. 3612-3621 ◽  
Author(s):  
Gholamhossein Mohammadnezhad ◽  
Mohammad Dinari ◽  
Roozbeh Soltani
Keyword(s):  
Thermal Properties ◽  
Polymer Matrix ◽  
Active Sites ◽  
In Situ Polymerization ◽  
Ion Removal

The addition of nanoboehmite as a nanofiller into the polymer matrix led to the improvement of the thermal properties and increased the active sites of nanocomposites for Cu(ii) removal.

scholarly journals Anchoring carbon layers and oxygen vacancies endow WO3−x/C electrode with high specific capacity and rate performance for supercapacitors

RSC Advances ◽  
2019 ◽  
Vol 9 (49) ◽  
pp. 28793-28798 ◽  
Author(s):  
Juan Xu ◽  
Chongyang Li ◽  
Lulu Chen ◽  
Zhongyang Li ◽  
Pibin Bing
Keyword(s):  
Redox Reaction ◽  
Active Sites ◽  
High Performance ◽  
Oxygen Vacancies ◽  
Specific Capacity ◽  
Carbon Layer ◽  
Rate Performance ◽  
Supercapacitor Electrode ◽  
High Specific Capacity ◽  
Hierarchical Carbon

A high-performance supercapacitor electrode comprising hierarchical carbon layer-anchored WO3−x/C nanowires with inner abundant redox reaction active sites and numerous oxygen vacancies is presented.

Highly dispersed clay–polyolefin nanocomposites free of compatibilizers, via the in situ polymerization of α-olefins by clay-supported catalysts

2008 ◽  
pp. 4186 ◽  
Author(s):  
Susannah L. Scott ◽  
Brian C. Peoples ◽  
Cathleen Yung ◽  
René S. Rojas ◽  
Vikram Khanna ◽  
...  
Keyword(s):  
In Situ Polymerization ◽  
Supported Catalysts ◽  
Highly Dispersed

Hierarchical walnut-like Ni0.5Co0.5O hollow nanospheres comprising ultra-thin nanosheets for advanced energy storage devices

2017 ◽  
Vol 5 (12) ◽  
pp. 5781-5790 ◽  
Author(s):  
Yuanzhi Jiang ◽  
Chenguang Tang ◽  
Hang Zhang ◽  
Tianyang Shen ◽  
Cui Zhang ◽  
...  
Keyword(s):  
Energy Storage ◽  
Active Sites ◽  
Specific Capacity ◽  
Rate Performance ◽  
Narrow Gap ◽  
Hollow Nanospheres ◽  
Energy Storage Devices ◽  
Storage Devices ◽  
Thin Nanosheets

As-prepared hierarchical Ni0.5Co0.5O hollow nanospheres comprising ultra-thin nanosheets exhibit a superior specific capacity and excellent rate performance due to the abundant active sites and fascinating narrow-gap channel.

Integrating conductivity and active sites: Fe/Fe3C@GNC as an trapping-catalyst interlayer and dendrite-free lithium host for the lithium–sulfur cell with outstanding rate performance

2020 ◽  
Vol 8 (36) ◽  
pp. 18987-19000
Author(s):  
Mi Zhang ◽  
Yi Guo ◽  
Yunhong Wei ◽  
Boya Wang ◽  
Yin Zhang ◽  
...  
Keyword(s):  
Active Sites ◽  
Carbon Matrix ◽  
Rate Performance ◽  
Lithium Sulfur

A Fe/Fe3C nanoparticle-embedded graphitic N-doped carbon matrix was developed as a multifunctional interlayer and lithium host with outstanding performance.

Porous CuO@C composite as high-performance anode materials for lithium-ion batteries

2020 ◽  
Vol 49 (33) ◽  
pp. 11597-11604 ◽  
Author(s):  
Yang Xu ◽  
Kainian Chu ◽  
Zhiqiang Li ◽  
Shikai Xu ◽  
Ge Yao ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Materials ◽  
Active Sites ◽  
High Performance ◽  
Lithium Ion ◽  
Carbon Matrix ◽  
Cuo Nanoparticles ◽  
Electrochemical Reactions

The in situ formation of a carbon matrix can confine the growth of CuO nanoparticles, which can provide more exposed active sites for electrochemical reactions.

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