ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 31
·期 8
·2008033
·
IF 16.836
Ying Liu,Yue Jiang,Zhe Hu,Jian Peng,Weihong Lai,Dianlun Wu,Shouwei Zuo,Jing Zhang,Bin Chen,Ziwen Dai,Yingguo Yang,Yang Huang,Wei Zhang,Wei Zhao,Wang Zhang,Lei Wang,Shulei Chou
Vanadium-based materials are fascinating potential cathodes for high energy density Zn-ion batteries (ZIBs), due to their high capacity arising from multi-electron redox chemistry. Most vanadium-based materials suffer from poor rate capability, however, owing to their low conductivity and large dimension. Here, we propose the application of V 2 C MXene (V 2 CT x ), a conductive 2D nanomaterial, for achieving high energy density ZIBs with superior rate capability. Through an initial charging activation, the valence of surface vanadium in V 2 CT x cathode is raised significantly from V 2+ /V 3+ to V 4+ /V 5+ , forming a nanoscale vanadium oxide (VO x ) coating that effectively undergoes multi-electron reactions, whereas the inner V-C-V 2D multi-layers of V 2 CT x are intentionally preserved, providing abundant nanochannels with intrinsic high conductivity. Owing to the synergistic effects between the outer high-valence VO x and inner conductive V-C-V, the activated V 2 CT x presents an ultrahigh rate performance, reaching 358 mAh g −1 at 30 A g −1 , together with remarkable energy and power density (318 Wh kg −1 /22.5 kW kg −1 ). The structural advantages of activated V 2 CT x are maintained after 2000 cycles, offering excellent stability with nearly 100% Coulombic efficiency. This work provides key insights into the design of high-performance cathode materials for advanced ZIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2016
·
IF 2.758
Jin Han,Maowen Xu,Min Jia,Ting Liu
NiSb 2 O 6 and reduced graphene oxide (NiSb 2 O 6 /rGO) nanocomposites are successfully fabricated by a solid-state method combined with a subsequent solvothermal treatment and further used as anode material of lithium-ion battery. The NiSb 2 O 6 /rGO nanocomposites exhibit a higher reversible capacity (of ca. 1240.5 mA h g −1 at a current density of 50 mA g −1 ), along with a good rate capability (395.2 mA h g −1 at a current density of 1200 mA g −1 ) and excellent capacity retention (684.5 mA h g −1 after 150 cycles). These good performances could be attributed to the incorporated reduced grapheme oxide, which significantly improves the electronic conductivity of the NiSb 2 O 6 .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2022
·Vol. 9
·期 14
·3484-3493
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IF 7.779
Albert Claude Jean-Pierre Daubry,Zhuijun Xu,Ming Yang,Ya-Jun Cheng,Yonggao Xia,Xile Hu
Lithium-ion batteries with enhanced rate performance are of crucial importance for practical applications. Extensive studies on the structural design and surface modification of electrode materials with the aim of improving the rate performance have been reported. Here we describe a new concept to enhance the rate capability by incorporating a tiny amount of metal species into the electron conductive agent. We show that the Si/C composite anode exhibits increased capabilities at high current densities when oxidized Ketjen black (KJB) with incorporated cobalt (Co-ox-KJB) is used as the electron conductive agent. Compared with the pristine KJB, the reversible capacities of the Si/C electrode with the Co-ox-KJB are increased by 180% on average at 1.50 A g−1 (279 mA h g−1vs. 73 mA h g−1, respectively). A synergistic contribution from enhanced electron conductivity by Co incorporation, improved affinity towards the electrolyte and an enhanced desolvation process by surface functional groups is responsible for the improved electrochemical performance. This approach is applicable for super P-based electron conductive agents as well.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
IONICS
·
2014
·Vol. 20
·期 10
·1495-1500
·
IF 1.836
Liu Jie,Du Chenqiang,Tang Zhiyuan
The titanate spinel Li 2 NiTi 3 O 8 is proposed for the first time as a new anode for lithium-ion batteries and successfully synthesized via a facile ball-milling assisted solid-state reaction method. The sample is characterized by X-ray diffraction patterns (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), galvanostatic charge–discharge tests, cyclic voltammetry (CV) tests, and electrochemical impedance spectroscopy (EIS). The results reveal that the Li 2 NiTi 3 O 8 nanoparticles have well-distributed morphology, and the particle size ranges between 100 and 300 nm. Although the initial coulombic efficiency is only 56.3 %, the Li 2 NiTi 3 O 8 electrode still exhibits a high rate capability and excellent cycling stability. The Li 2 NiTi 3 O 8 anode provides a large capacity of 212.3 mAh g −1 at 0.1 A g −1 after 10 cycle, which is close to its theoretical capacity (223.6 mAh g −1 ). Even after 100 cycles, it still delivers a quite high capacity of 203.98 mAh g −1 , with no significant capacity fading. This indicates that the as-synthesized Li 2 NiTi 3 O 8 material is a promising anode material for lithium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Jiale Fu,Daobin Mu,Borong Wu,Jiaying Bi,Hui Cui,Hao Yang,Hanfeng Wu,Feng Wu
An amount (5 wt %) of lithium tungstate (Li2WO4) as an additive significantly improves the cycle and rate performances of the LiNi0.6Co0.2Mn0.2O2 electrode at the cutoff voltage of 4.6 V. The 5 wt % Li2WO4-mixed LiNi0.6Co0.2Mn0.2O2 electrode delivers a reversible capacity of 199.2 mA h g–1 and keeps 73.1% capacity for 200 cycles at 1 C. It retains 67.4% capacity after 200 cycles at 2 C and delivers a discharge capacity of 167.3 mA h g–1 at 10 C, while those of the pristine electrode are only 44.7% and 87.5 mA h g–1, respectively. It is shown that the structure of the LiNi0.6Co0.2Mn0.2O2 cathode material is not affected by mixing Li2WO4. The introduced Li2WO4 effectively restrains the LiPF6 and carbonate solvent decomposition by consuming PF5 at high cutoff voltage, forming a stable cathode/electrolyte interface film with low resistance.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Renming Zhan,Youquan Zhang,Hao Chen,Qiuju Xu,Qianru Ma,Wei Gao,Tingting Yang,Jian Jiang,Shujuan Bao,Maowen Xu
Sponge-like three-dimensional porous carbon-encapsulated Na3.32Fe2.34(P2O7)2 nanoparticles (labeled to NFPO@SC) were manufactured by a sol–gel method followed by multistage calcinations and utilized as the cathode material for sodium-ion batteries. The excellent electrochemical performance of the NFPO@SC cathode can be attributed to its unique porous structure, which facilitates electrolyte penetration, reduces the diffusion path of sodium ions, and increases electronic conductivity. In addition, the full battery is assembled by NFPO@SC and hard carbon, which are employed as cathode and anode electrodes, respectively. The full battery delivers a high discharge capacity (112.2 mA h g–1 at 0.5 C) and maintains 93.9% stable capacity over 1000 cycles at 5 C.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
Materials Today Energy
·
2020
·
IF 5.604
Tao Lu,Zhonghua Zhang,Bingbing Chen,Shanmu Dong,Chengdong Wang,Aobing Du,Longlong Wang,Jun Ma,Guanglei Cui
Magnesium batteries are recognized as a potential alternative to lithium ion batteries benefited from the advantages of low cost, high safety, and high energy density . But the development of magnesium batteries suffers from the sluggish motion of Mg 2+ in solid electrodes due to strong polarization. Compounds explored to accommodate magnesiation/demagnesiation, suffer from low capacity, sluggish kinetics and poor cycling performance. In this manuscript, copper current collector aided tellurium (Te) as the cathode material of magnesium battery is proposed. Due to superior electronic structure of Te atom, both reactants and products of cathode reaction exhibit metallic conductivity which accelerates the magnesiation/demagnesiation process This material delivers a specific capacity of 338 mAh/g at 100 mA/g, and keeps at 178.5 mAh/g after 400 cycles. Moreover, the electrode performs superior rate capability than the previously reported materials. A specific capacity of 265.4 mAh/g is achieved at 2 A/g without obvious polarization. Even at a very high current density of 3.75 A/g, a specific capacity of 118 mAh/g is still maintained. This study highlights the importance of electronic structure for multi-valent ion reaction related material, which also offers new strategy for cathode design of Mg batteries.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yi-Hu Feng,Zhiwei Cheng,Chen-Liang Xu,Lianzheng Yu,Duo Si,Boheng Yuan,Mengting Liu,Bin Zhao,Peng-Fei Wang,Xiaogang Han
O3-NaNi0.25Fe0.5Mn0.25O2 layered oxide is considered one of the most promising cathode candidates for sodium-ion batteries because of its advantages, such as its large capacity and low cost. However, the practical application of this material is limited by its poor cyclic stability and insufficient rate capability. Here, a strategy to substitute the Fe3+ in NaNi0.25Fe0.5Mn0.25O2 with Al3+ is adopted to address these issues. The substitution of Fe3+ with Al3+ enhances the framework stability and phase transition reversibility of the parent NaNi0.25Fe0.5Mn0.25O2 material by forming a stronger TM–O bond, which improves the cycling stability. Moreover, partial Al3+ substitution increases the interslab distance, providing a spacious path for Na+ diffusion and resulting in fast diffusion kinetics, which lead to improved rate capability. Consequently, the target NaNi0.25Fe0.5–xAlxMn0.25O2 sample with optimal x = 0.045 exhibits a remarkable electrochemical performance in a Na-ion cell with a large reversible capacity of 131.7 mA h g–1, a stable retention of approximately 81.6% after cycling at 1C for 100 cycles, and a rate performance of 81.3 mA h g–1 at 10C. This method might pave the way for novel means of improving the electrochemical properties of layered transitional-metal oxides and provide insightful guidance for the design of low-cost cathode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Qiang Shu,Xiaojiang Hou,Kaiming Hou,Xiaohui Ye,Qianhong Cao,Danting Li,Guoquan Suo
Hybrid magnesium-lithium batteries (MLIBs) have become the focus of research due to the advantages of combining a magnesium metal anode (free dendrite) and Li-driven reaction cathode (fast ion diffusion rate). VS 4 with large interchain space can be used as a potential cathode for MLIBs, but its low conductivity and weak structural stability limit the development of MLIBs. In this work, MoS 2 was introduced into VS 4 to induce the generation of abundant sulfur vacancies , which improved the structural stability and Li + ion transport properties of VS 4 . The VS 4 /MoS 2 cathode retains stability and an impressively high reversible capacity of 581.7 mAh·g −1 after 100 cycles, corresponding to a capacity retention of 98.99 % (compared with the second cycle). Meanwhile VS 4 /MoS 2 still has 472.64 mAh·g −1 at high current density of 1500 mA·g −1 , which is much higher than that of NF-VS 4 (11.9 mAh·g −1 ) and VF-VS 4 (29.8 mAh·g −1 ). This work points the way to ameliorate Mg-based rechargeable batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
DIAMOND AND RELATED MATERIALS
·
2024
·
IF 4.3
Shuai Yang,Tao Li,Jun Fang,Shichong Yao,Zhenyu Li,Yunyun Liu,Jie Chen,Yuanliang Yuan,Xiaocong Zhong
N,O-codoped microporous carbon (HPC) was derived from hypnum plumaeforme via precarbonization and KOH activation and utilized as an electrode for supercapacitors. The HPC750 sample, produced at an activation temperature of 750 °C, demonstrated superior capacitive behavior due to its large specific surface area, microporous architecture, and high number of oxygen and nitrogen heteroatoms. These HPC750 electrodes have a specific capacitance of up to 424 F g −1 at a current density of 1 A g −1 while also providing excellent rate performance, maintaining >85 % capacitance over a range of 1 to 100 A g −1 . In a symmetric supercapacitor configuration using 6 M KOH and 1 M Na 2 SO 4 as electrolytes, the HPC750 electrodes exhibit high specific capacitances of 96.2 F g −1 and 65.8 F g −1 at a current density of 1 A g −1 , respectively. With the Na 2 SO 4 electrolyte, the device achieved a peak energy density of 29.9 W h kg −1 and a peak power density of 225 W kg −1 . In addition, the electrodes retained approximately 90 % of their initial capacitance after 15,000 cycles at a current density of 5 A g −1 .
研究领域:
材料科学
·
能源存储
·
植物学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Shaohui Wang,Lin Li,Hua Wang,Xiaowen Wang,Tonghua Wang
The continuous and scalable manufacture of porous carbon electrode materials with controlled pore architecture holds paramount importance in the development of efficient and sustainable energy storage systems. Herein, a green and industrially feasible physical activation strategy was proposed to produce heteroatom self-doped hierarchical porous carbons (HPCs) by using polyvinyl butyral (PVB) as a sacrificial template and cross-linking agent and low-rank coal as a low-cost precursor. The optimal HPC-20 has highly interconnected multiscale pore structure, large specific surface area, and heteroatom-enriched surfaces. The synergistic effect of these advantages provides HPC-20 with a variety of benefits, including fast charge/discharge rates and abundant energy storage sites. Specifically, HPC-20 exhibited an appreciable specific capacitance of 304 F g–1 at 0.5 A g–1 and an excellent rate performance (capacitance retention of 65.8% at 50 A g–1). Furthermore, the symmetric supercapacitor achieved a maximum energy density of 23.1 W h kg–1 at a power density of 450 W kg–1 in 1 M Na2SO4 electrolytes. This work proposes an approach for the large-scale production of porous carbon with a controllable pore structure from low-rank coal.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 6
·060523
·
IF 3.1
Hongfeng Liu,Yingshuai Wang,Yusong Wang,Amna Safdar,Feng Wu,Hongcai Gao
Layered transition metal oxides have great potential as cathode materials for sodium ion batteries, but some limitations like structural instability and poor rate performance restricts its further application. To overcome the above issues, a simultaneously modified P2-type cathode of Na0.85Li0.12Ni0.22Mn0.66O2 with 1% weight TiO2 coating (NLNMO-1%wt TiO2) based on doping and coating approaches was prepared by high-temperature solid-state reaction and liquid phase coating. This new strategy reduces the relative content of Mn3+, which suppresses the Jahn-Teller effect and enhanes the structural stability. The as-prepared cathode shows improved rate capability, with a high reversible capacity of 111.4 mAh g−1 at 1 C and a capacity retention of 94.5% after 100 cycles. At 5 C, it maintains a capacity of 87.1 mAh g−1 at 5 C with capacity retention of 81.8% after 400 cycles. Additionally, it provides a stable CEI film, reducing side reactions and electrode pulverization. which could be confirmed by scanning electron microscopy and high-resolution transmission electron microscopy. Overall, this synergistic modification strategy provides a pathway for improving the electrochemical performance of layered oxide cathode materials for sodium-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）