Small
·
2025
·
IF 12.1
Ming Li,Xiongwei Gong,Yilong Hu,Yi Shuai,Yunong Zhou,Mingliang Wu,Xiaoyi Huangyang,Jinqi Huang,Yingpeng Wu
Due to the abundant availability of Na resources, Na batteries garner significant attention. Anode-free Na batteries, devoid of active negative materials, are deemed promising candidates for the next generation of high-energy-density Na batteries. The cyclic stability of anode-free Na batteries primarily hinges on the stability of the limited Na supplied by the cathode, and the design of the anode substrate plays a pivotal role. In this study, a cost-effective aluminum–tin eutectic alloy substrate is developed using a straightforward melting process. In eutectic alloy, tin element is present in its metallic form, which facilitates the disruption of the compactness of the Passivation film (Al 2 O 3 ). Besides, tin metal and tin dioxide on the surface of the eutectic alloy show a strong Na affinity (strong binding energy with Na atom and lower Na nucleation barrier), thereby promoting the uniform nucleation of sodium. This eutectic alloy substrate enables highly reversible Na plating/stripping with an average coulombic efficiency of 99.97%, and the cycle life exceeds 4000 cycles. Coupling with Na 3 V 2 (PO 4 ) 3 , the AlSn-2%-NVP full cell exhibits a capacity retention of up to 81% after 100 cycles, significantly outperforming coated carbon aluminum foils and aluminum foils. This study introduces an efficient approach to the anode-free Na battery.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2025
·
IF 21.1
Xiaopeng Li,Haichao Wang,Qingxiang Ma,Jucang Ke,Xiuyun Jiang,Caixia Zhu,Linlin Zhao,Ao Zhang,Hao Chen,Yao Deng,Xinhua Gao,Guangbo Liu,Tian-Sheng Zhao,Noritatsu Tsubaki
The conversion of CO 2 into ethanol with value-added still exists challenge, especially the CO 2 hydrogenation over Co-based catalysts is still C1 product dominated by CH 4 . Here, we report a xNa-CoMnO catalyst to promoting ethanol synthesis from CO 2 hydrogenation. The experimental results indicated that there was almost no adsorption and conversion of CO 2 on pure Co 0 , and the CO 2 hydrogenation production of the CoMnO catalyst prepared by adding Mn was mainly CH 4 . The loading of Na not only increased the concentration of oxygen defects on the CoMnO catalyst, but also improved the strength of the Co-O in the CoMnO catalyst, which was able to adsorb effectively the undissociated *CO in the reaction process, and promote the C-C coupling between the *CO and the generated *CH x , promoted the synthesis of ethanol. Under optimized reaction conditions (240 °C, 3.0 MPa, GHSV = 1200 mL/g/h), the 2Na-CoMnO catalyst showed ethanol selectivity of 18.89 % and space-time yield of ethanol of 1.27 mmol/g/h, which exceeded most of the reported results. More importantly, beyond delivering an excellent-performance catalytic system, this study also provides fundamental insights for the rational design of Co-based catalysts for selective CO 2 -to-ethanol conversion.
研究领域:
催化化学
·
能源化学
·
环境化学
·
材料化学
·
工业催化
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Guolin Cao,Zhuomin Jin,Yuebing Dong,Qiyong Shi
LiNi0.8Co0.1Mn0.1O2 (NCM811) is considered a cathode material with great commercial potential. However, Li/Ni mixing, residual lithium compounds, and side reaction limited the popularity of Ni-rich batteries. Thus, a simple strategy is employed to realize a comodification of Na+ and Y3+. As demonstrated in the XPS results, the residual lithium compounds (Li2CO3/LiOH) and side reaction products are inhibited. The capacity retention rate of the modified NCM811 is 86.4% after 300 cycles at 1C, 34.5% higher than that of the pristine. Na+ expands the space of the Li+ slab, thereby reducing the charge transfer resistance and inhibiting the mixed discharge of cations. Meanwhile, Y3+ decreased the lattice along c-axis to restrict the movement of cations (Ni2+) into the Li site, with improving the exchange of Li+. The formed LiYO2 coating layer restrains the direct contact between the electrolyte and the electrode material so that side reactions are inhibited, reducing the electrochemical resistance.
研究领域:
材料科学
·
电化学
·
储能技术
·
锂离子电池
✓ 已验证
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Yanlin Han,Minghui Yang,Ye Zhang,Junjie Xie,Dongguang Yin,Chilin Li
Na-ion batteries (NIBs) are becoming more promising owing to potentially better rate performance than Li-ion batteries apart from resource abundance. However, activation of Na-storage electrochemistry remarkably depends on the modification or expansion of existing structure prototypes by adjusting the substituent and linkage of their ligand moieties or the redox transition metals. Recently the natural existence of mineral phases has inspired us to explore more plentiful artificial analogues, most of which possess open framework properties. Here for the first time we propose a novel bronze phase (tetragonal tungsten bronze, TTB) of oxyfluoride (KNb2O5F) as a potential NIB anode. This tunnel-type open framework is achieved by equimolar KF doping into T-Nb2O5 with K and F as channel supporter and ligand substituent, respectively. The improvement of intrinsic conductivity and near-zero strain sodiation enable a highly reversible capacity even by employing undecorated samples of less surface defects. Reduction of Nb5+ may cause a uniform precipitation of fine NbO2 nanoparticles around larger solidated KNb2O5F.
研究领域:
材料科学
·
储能
·
电化学
·
无机化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Waquar Ahmed Khokhar,Ning Zhao,Weilin Huang,Hao Wang,Zhijie Bi,Xiangxin Guo
Solid-state batteries with alkali metals (Li, Na, etc.) as anodes have the potential to achieve high energy density. However, the Li penetration through the garnet occurs without preindication during electrochemical cycling, leading to sudden short circuit and safety concerns. Various improvement strategies are developed but such a problem still exists when the current density exceeds the critical value. In contrast, the electrochemical Na plating/stripping on the β″-alumina ceramic electrolyte (BASE) has been explored with improved interfacial contacts by introducing an Au intermediate layer. When being cycled around the critical current density, the polarization potential of the Na/Au/BASE symmetric cells increases progressively until it stabilizes at a certain value without the sudden short circuit. It is revealed that the increasing polarization originates from a gradual Na penetration into the BASE ceramics from the interface and the subsequent stable cycles correlate with the formation of a sustainable Na/Au/BASE interface. These results disclose the difference in a growth model of metal filaments through Li and Na solid electrolytes, shedding new light on understanding of the metal penetration in solid electrolytes.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Yingfang Tao,Jie Lin,Deyin Wang,Yuhua Wang
A new type of carbon dots that emit blue emission in aqueous state while cyan emission in solid state was synthesized by a simple hydrothermal method. The photoluminescence quantum yield of the carbon dots in aqueous state and solid state is 7.6% and 29.2%, respectively. The enhanced and red-shifted emission observed in solid state carbon dots is ascribed to surface state change caused by aggregation. The occurrence of surface state change in solid state carbon dots has been evidenced by concentration dependent steady-state photoluminecence spectra and time-resolved luminescence decay. Surface functionalization by Na + is beneficial for carbon dots to resist luminescence quenching in solid state. A proof-of-concept study was performed to demonstrate the potential application of the obtained carbon dots as inks for anti-counterfeiting and printing high quality fluorescent images.
研究领域:
材料科学
·
纳米技术
·
光学材料
·
光致发光
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Weize Jin,Tao Zhou,Zhaolei Wang,Wenwen Xue,Chun Feng,Fang Zhang,Xiaoyu Huang,Dong Yang,Patrick Théato,Yongjun Li
Covalently grafting redox-active polymer to graphene sheets is a practical approach for developing high-performance organic cathode materials . Here, we report a facile preparation of radical polymer poly(2,2,6,6-tetramethylpiperidin-1-oxyl-4-yl methacrylate) (PTMA) grafted graphene sheets (rGO) composites (rGO- g -PTMA) with various PTMA contents via one-step radical polymerization , and their applications as cathodes for Li-ion/Na-ion batteries. The energy storage capacity of rGO- g -PTMA is determined by the relative contribution from the battery-type redox reaction of PTMA and the pseudocapacitive behavior of rGO sheets. The optimized rGO- g -PTMA 50 composite with 50 wt% of PTMA shows excellent energy storage performance, which is almost two times higher than that of the physically blended rGO/PTMA 50 owing to reduced solubility of PTMA in electrolyte solution and improved electrical conductivity . As cathode materials for Li-ion/Na-ion batteries, rGO- g -PTMA 50 shows superior performance including high capacity, good cycling and rate stability. Hence, this covalently bonded radical polymers on graphene provide new option for developing high-performance organic cathode materials for Li-ion/Na-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
高分子化学
·
电池技术
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Jiaming Hu,Shuai Zhang,Chen Feng,Shanggeng Li,Longfei Zhang,Jiajun Ma,Qiang Yin
In this work, an efficient Fe 3+ adsorbent was synthesized by using the tryptamine and sodium carboxymethyl cellulose (CMC-Na) modified polyacrylamide gel. The functional monomers synthesized by the reaction of tryptamine and methacrylic acid chloride were doped into the composition, and CMC-Na participated in the formation of the gel network. By changing different conditions, the optimal use conditions of the gel were explored. The Langmuir and Freundlich isotherm models were used to discuss the adsorption behavior. According to the fitting results, the Freundlich model was more suitable for explaining the adsorption of Fe 3+ by gels. The feasibility of its adsorption process was confirmed by the study of its kinetics and thermodynamics. As an adsorbent, tryptamine CMC-Na modified polyacrylamide gel has excellent ability to remove Fe 3+ from aqueous solutions. The maximum adsorption capacity of tryptamine and CMC-Na modified polyacrylamide gel for Fe 3+ reached 127.5 mg g −1 .
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2017
·Vol. 27
·期 28
·1701130
·
IF 12.124
Dunping Cao,Congling Yin,Dingren Shi,Zhengwen Fu,Jincang Zhang,Chilin Li
Exploring novel structure prototype and mineral phase, especially open framework material, is crucial to developing high-performance Na-ion battery cathodes in view of potentially faster intrinsic diffusion of Na + in lattices. Perovskite phases have been widely applied in solar cells, fuel cells, and electrocatalysis; however, they are rarely attempted as energy storage electrode materials. This study proposes pre-expanding perovskite iron fluoride (KFeF 3 ) framework by stuffing large-sized K + as a channel filler, which is advantageous over Na + , NH 4 + , and H 2 O molecule filler in terms of structure robustness, symmetry, and connectivity. K + stuffing leads to the preservation of a more “regular” cubic phase with fast isotropic 3D diffusion as a consequence of no distortion of FeF 6 octahedra during K-Na electrochemical exchange and following Na-insertion cycling. High-rate Na-storage is achievable with a reversible capacity of 110, 70, and 40 mAh g −1 at 0.1, 2, and 10 C, respectively, for this open framework fluoride cathode, benefiting from solid solution electrochemical behavior and high intrinsic diffusion coefficient. It is thought that this rate performance is currently the best among Na-storage fluoride materials.
研究领域:
材料科学
·
储能
·
电化学
·
无机化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 14
·9749-9755
·
IF 3.9
Dongyun Han,Lei Liang,Yongya Zhang,Lilan Yi,Xincheng Hu,Wei Wei
Germanium (Ge) based nanomaterials are regarded as promising high-capacity anode materials for Na ion batteries, but suffer fast capacity fading problems caused by the alloying/de-alloying reactions of Na–Ge. Herein, we report a new method for preparing highly dispersed GeO2 by using molecular-level ionic liquids (ILs) as carbon sources. In the obtained GeO2@C composite material, GeO2 exhibits hollow spherical morphology and is uniformly distributed in the carbon matrix. The as-prepared GeO2@C exhibits improved Na ion storage performances including high reversible capacity (577 mA h g−1 at 0.1C), rate property (270 mA h g−1 at 3C), and high capacity retention (82.3% after 500 cycles). The improved electrochemical performance could be attributed to the unique nanostructure of GeO2@C, the synergistic effect between GeO2 hollow spheres and the carbon matrix ensures the anode material effectively alleviates the volume expansion and the particle agglomeration problems.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
He Li,Yunhui Wang,Jiali Jiang,Yiyong Zhang,Yueying Peng,Jinbao Zhao
In this work, CuS microspheres are synthesized by a facile microwave synthesis without any template or additive. As-prepared CuS microspheres display steady reversibility by adopting triethylene glycol dimethyl ether (TEGDME) as the electrolyte solvent and adjusting cut-off voltage to 0.6 − 3.0 V. The discharge capacity stands at 162 mAh g −1 after 200 cycles with the capacity retention of 95.8%. Electrochemical kinetics of CuS electrodes is investigated by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) and galvanostatic intermittent titration technique (GITT) tests. Beyond that, electrochemical reactions of CuS electrodes are explored using ex-situ X-ray diffraction (XRD). As far as we know, it is not only the best performance of CuS electrodes in Na-ion batteries (NIBs) but also the first time that the kinetics and reaction mechanism of CuS in NIBs are investigated.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Polymer Materials
·
2021
·
IF 4.089
Jianghe Liu,Zijian Ye,Xingcheng Hu,Sultan Ahmed,Shenhua Song
The scarcity of Li along with its uneven distribution in earth has become a great challenge in the field of electrochemical energy storage. Replacing Li with Na may address the above issues, as Na and Li are very similar in electrochemical characteristics, and Na is abundant in nature with low cost. Herein, the Na-ion conducting gel polymer membranes comprising a 2-HEC/EMITf/NaTf system are synthesized by employing the solution-casting method. The effects of NaTf salt and EMITf ionic liquid on the electrical and electrochemical properties of membranes are investigated. It is demonstrated that the salt is dissolved in the polymer matrix, thereby raising its ionic conductivity (IC), which is further raised by ionic liquid incorporation. The optimized membrane (2-HEC:EMITf:NaTf = 1:0.6:0.15 in mass, named as GPE/Na-3) exhibits a high room-temperature IC of 1.11× 10–3 S cm–1 along with a wide electrochemical stability window of 4.8 V. The membrane also displays sound tensile strength and breaking strain (4.5 MPa and 94.4%, respectively). As the electrolyte, the optimized membrane is combined with graphene electrodes to fabricate a supercapacitor. The supercapacitor presents a high capacitive behavior with an appealing cyclic stability. As evident from the above performance, it is believed that the Na-ion conducting gel polymer membrane possesses potential applications in future Na-ion energy storage devices.
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）