Ultrathin carbon nanosheets for highly efficient capacitive K-ion and Zn-ion storage

2020 ◽  
Vol 8 (43) ◽  
pp. 22874-22885
Author(s):  
Yamin Zhang ◽  
Zhongpu Wang ◽  
Deping Li ◽  
Qing Sun ◽  
Kangrong Lai ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Template Method ◽  
Carbon Nanosheets ◽  
Hierarchically Porous ◽  
Highly Efficient ◽  
Ion Storage

Through an in situ self-template method, ultrathin hierarchically porous carbon nanosheets are facilely prepared, delivering superior capacitive K-ion and Z-ion storage.

All-around coating of CoNi nanoalloy using a hierarchically porous carbon derived from bimetallic MOFs for highly efficient hydrolytic dehydrogenation of ammonia-borane

2020 ◽  
Vol 44 (7) ◽  
pp. 3021-3027 ◽  
Author(s):  
Min-Jie Chen ◽  
Dai-Xue Zhang ◽  
Dan Li ◽  
Shan-Chao Ke ◽  
Xiao-Chen Ma ◽  
...  
Keyword(s):  
Heterogeneous Catalysis ◽  
Porous Carbon ◽  
Ammonia Borane ◽  
Core Shell ◽  
Hierarchically Porous ◽  
Highly Efficient

In situ synthesis of core–shell carbon enclosed CoNi alloys achieves efficient heterogeneous catalysis.

Direct synthesis of 3D hierarchically porous carbon/Sn composites via in situ generated NaCl crystals as templates for potassium-ion batteries anode

2018 ◽  
Vol 6 (2) ◽  
pp. 434-442 ◽  
Author(s):  
Kangsheng Huang ◽  
Zheng Xing ◽  
Liancheng Wang ◽  
Xuan Wu ◽  
Wei Zhao ◽  
...  
Keyword(s):  
Porous Carbon ◽  
Volume Expansion ◽  
Direct Synthesis ◽  
Potassium Ion ◽  
Template Method ◽  
Hierarchically Porous ◽  
Direct Exposure

3D hierarchically porous carbon/Sn composites is synthesized by in situ NaCl template method, which can effectively avoid the direct exposure of elemental Sn to the electrolyte, efficiently alleviate the volume expansion and exhibits good potassiation/depotassiation capacity.

Ultrathin Carbon Nanosheets for Highly-efficient Capacitive K-ion and Zn-ion Storage

2020 ◽  
Author(s):  
Yamin Zhang ◽  
Zhongpu Wang ◽  
Deping Li ◽  
Qing Sun ◽  
Kangrong Lai ◽  
...  
Keyword(s):  
Energy Storage ◽  
Porous Carbon ◽  
Metal Ion ◽  
Rate Capability ◽  
Energy Storage Devices ◽  
Capacity Retention ◽  
Carbon Nanosheets ◽  
Storage Devices ◽  
High Efficient ◽  
Ion Storage

<p></p><p>Porous carbon has attracted extensive attentions as the electrode material for various energy storage devices considering its advantages like high theoretical capacitance/capacity, high conductivity, low cost and earth abundant inherence. However, there still exists some disadvantages limiting its further applications, such as the tedious fabrication process, limited metal-ion transport kinetics and undesired structure deformation at harsh electrochemical conditions. Herein, we report a facile strategy, with calcium gluconate firstly reported as the carbon source, to fabricate ultrathin porous carbon nanosheets. <a>The as-prepared Ca-900 electrode delivers excellent K-ion storage performance including high reversible capacity (430.7 mAh g<sup>-1</sup>), superior rate capability (154.8 mAh g<sup>-1</sup> at an ultrahigh current density of 5.0 A g<sup>-1</sup>) and ultra-stable long-term cycling stability (a high capacity retention ratio of ~81.2% after 4000 cycles at 1.0 A g<sup>-1</sup>). </a>Similarly, when being applied in Zn-ion capacitors, the Ca-900 electrode also exhibits an ultra-stable cycling performance with ~90.9% capacity retention after 4000 cycles at 1.0 A g<sup>-1</sup>, illuminating the applicable potentials. Moreover, the origin of the fast and smooth metal-ion storage is also revealed by carefully designed consecutive CV measurements. Overall, considering the facile preparation strategy, unique structure, application flexibility and in-depth mechanism investigations, this work will deepen the fundamental understandings and boost the commercialization of high-efficient energy storage devices like potassium-ion/sodium-ion batteries, zinc-ion batteries/capacitors and aluminum-ion batteries.</p><br><p></p>

A novel eutectic solvent precursor for efficiently preparing N-doped hierarchically porous carbon nanosheets with unique surface functional groups and micro-pores towards dual-carbon lithium-ion capacitors

2021 ◽  
Author(s):  
Kaixiang Zou ◽  
Yuanfu Deng ◽  
Weijing Wu ◽  
Shiwei Zhang ◽  
Guohua Chen
Keyword(s):  
Functional Groups ◽  
Porous Carbon ◽  
High Performance ◽  
Electrode Materials ◽  
Lithium Ion ◽  
Surface Functional Groups ◽  
Carbon Nanosheets ◽  
Hierarchically Porous ◽  
Li Ion ◽  
Unique Surface

High performance carbon-based materials are ideal electrode materials for Li-ion capacitors (LICs), but there are still many challenges such as the complicated preparation preocesses, high cost and low yield. Also,...

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