scholarly journals N/S-Co-Doped Porous Carbon Sheets Derived from Bagasse as High-Performance Anode Materials for Sodium-Ion Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1203 ◽  
Author(s):  
Lili Wang ◽  
Lei Hu ◽  
Wei Yang ◽  
Dewei Liang ◽  
Lingli Liu ◽  
...  

Heteroatom doping is considered to be an efficient strategy to improve the electrochemical performance of carbon-based anode materials for Na-ion batteries (SIBs), due to the introduction of an unbalanced electron atmosphere and increased electrochemical reactive sites of carbon. However, developing green and low-cost approaches to synthesize heteroatom dual-doped carbon with an appropriate porous structure, is still challenging. Here, N/S-co-doped porous carbon sheets, with a main pore size, in the range 1.8–10 nm, has been fabricated through a simple thermal treatment method, using KOH-treated waste bagasse, as a carbon source, and thiourea, as the N and S precursor. The N/S-co-doped carbon sheet electrodes possess significant defects, high specific surface area, enhanced electronic conductivity, improved sodium storage capacity, and long-term cyclability, thereby delivering a high capacity of 223 mA h g−1 at 0.2 A g−1 after 500 cycles and retaining 155 mA h g−1 at 1 A g−1 for 2000 cycles. This work provides a low-cost route to fabricate high-performance dual-doped porous carbonaceous anode materials for SIBs.

Carbon ◽  
2019 ◽  
Vol 151 ◽  
pp. 28-35 ◽  
Author(s):  
Mengyue Liu ◽  
Zhengping Zhang ◽  
Meiling Dou ◽  
Zhilin Li ◽  
Feng Wang

2021 ◽  
Vol 120 ◽  
pp. 108614
Author(s):  
Huiming Zhou ◽  
Rui Shu ◽  
Feiqiang Guo ◽  
Jiaming Bai ◽  
Yinbo Zhan ◽  
...  

Author(s):  
Ying Li ◽  
Xia Zhong ◽  
Xianwen Wu ◽  
Mingqi Li ◽  
Wei Zhang ◽  
...  

To develop high-performance and low-cost anode materials for sodium ion batteries, novel Bi/C nanosheet microspheres with open pore structure (labeled as ops-Bi/C nanosheet microspheres), in which nanosheets are assembled from...


RSC Advances ◽  
2021 ◽  
Vol 11 (53) ◽  
pp. 33208-33218
Author(s):  
Zhaojin Li ◽  
Qian Liu ◽  
Lizhi Sun ◽  
Ning Li ◽  
Xiaofeng Wang ◽  
...  

3D porous carbon with ultra-high specific surface area and excellent electrochemical performance is synthesized by a simple activation and carbonization process through adopting biomass yam waste as raw material.


Nanomaterials ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 2691
Author(s):  
Su-Ho Cho ◽  
Jong-Heon Kim ◽  
Il-Gyu Kim ◽  
Jeong-Ho Park ◽  
Ji-Won Jung ◽  
...  

Sodium-ion batteries (SIBs) have been increasingly studied due to sodium (Na) being an inexpensive ionic resource (Na) and their battery chemistry being similar to that of current lithium-ion batteries (LIBs). However, SIBs have faced substantial challenges in developing high-performance anode materials that can reversibly store Na+ in the host structure. To address these challenges, molybdenum sulfide (MoS2)-based active materials have been considered as promising anodes, owing to the two-dimensional layered structure of MoS2 for stably (de)inserting Na+. Nevertheless, intrinsic issues of MoS2—such as low electronic conductivity and the loss of active S elements after a conversion reaction—have limited the viability of MoS2 in practical SIBs. Here, we report MoS2 embedded in carbon nanofibers encapsulated with a reduced graphene oxide (MoS2@CNFs@rGO) composite for SIB anodes. The MoS2@CNFs@rGO delivered a high capacity of 345.8 mAh g−1 at a current density of 100 mA g−1 for 90 cycles. The CNFs and rGO were synergistically taken into account for providing rapid pathways for electrons and preventing the dissolution of S sources during repetitive conversion reactions. This work offers a new point of view to realize MoS2-based anode materials in practical SIBs.


Materials ◽  
2019 ◽  
Vol 12 (12) ◽  
pp. 1986 ◽  
Author(s):  
Tao Ai ◽  
Zhe Wang ◽  
Haoran Zhang ◽  
Fenghua Hong ◽  
Xin Yan ◽  
...  

Nitrogen hybridization is an attractive way to enhance the wettability and electric conductivity of porous carbon, which increases the capacitance of carbon-based supercapacitor, however, there is lack of low-cost methods to prepare the nitrogen-doped porous carbon materials. Herein, a novel facile nitrogen-containing bio-phenolic resin was synthesized by polymerization of the carbamate bio-oil, Phenol and paraformaldehyde. As a precursor of nitrogen-doped porous carbon, the nitrogen-containing bio-phenol resin was activated by the one-step molten-salt method. The resultant nitrogen-doped porous carbon showed a high specific surface area up to 1401 m2·g−1. As a supercapacitor electrode, the nitrogen-doped porous carbons showed specific capacitance of 159 F·g−1 at 0.5 A·g−1. It also exhibited high cyclic stability with 94.8% retention of the initial specific capacitance over 1000 charge-discharge cycles at 1.0 A·g−1. The results suggest that these nitrogen-containing bio-phenol resin provide a new source of nitrogen-doped porous carbon for high-performance supercapacitor electrodes.


Author(s):  
Yurou Chen ◽  
Xin Feng ◽  
Qi Wang ◽  
WenXian Gu ◽  
Wanyi Wu ◽  
...  

This work presents a simple solvothermal method to synthesize Ti, N co-doped carbon materials, in which the inclusion of a small amount of transition metal Ti significantly improved their electrochemical capacitive performance.


2021 ◽  
Vol 45 (12) ◽  
pp. 5712-5719
Author(s):  
Yongxiang Zhang ◽  
Peifeng Yu ◽  
Mingtao Zheng ◽  
Yong Xiao ◽  
Hang Hu ◽  
...  

Porous carbons with a high specific surface area (2314–3470 m2 g−1) are prepared via a novel KCl-assisted activation strategy for high-performance supercapacitor.


2021 ◽  
Vol 361 ◽  
pp. 115562
Author(s):  
Chunli Zhou ◽  
Dengke Wang ◽  
Hui Yang ◽  
Ang Li ◽  
Huaihe Song ◽  
...  

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