Advanced Science
·
2018
·Vol. 5
·期 6
·1800080
·
IF 12.441
Peng Ge,Hongshuai Hou,Xiaoyu Cao,Sijie Li,Ganggang Zhao,Tianxiao Guo,Chao Wang,Xiaobo Ji
Different dimensions of carbon materials with various features have captured numerous interests due to their applications on the tremendous fields. Restricted by the raw materials and devices, the controlling of their morphology is a major challenge. Utilizing the catalytic features of the intermediates from the low-cost salts and polymerization of 0D carbon quantum dots (CQDs), 0D CQDs are expected to self-assemble into 1/2/3D carbon structures with the assistance of temperature-induced intermediates (e.g., ZnO, Ni, and Cu) from the salts (ZnCl 2 , NiCl 2 , and CuCl). The formation mechanisms are illustrated as follows: 1) the “orient induction” to evoke “vine style” growth mechanism of ZnO; 2) the “dissolution–precipitation” of Ni; and 3) the “surface adsorption self-limited” of Cu. Subsequently, the degree of graphitization, interlayer distance, and special surface area are investigated in detail. 1D structure from 700 °C as anode displays a high Na-storage capacity of 301.2 mAh g −1 at 0.1 A g −1 after 200 cycles and 107 mAh g −1 at 5.0 A g −1 after 5000 cycles. Quantitative kinetics analysis confirms the fundamentals of the enhanced rate capacity and the potential region of Na-insertion/extraction. This elaborate work opens up an avenue toward the design of carbon with multidimensions and in-depth understanding of their sodium-storage features.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Ke Xiao,Peiyao Wang,Jin Bai,Yuanyuan Liu,Siya Wang,Shiyu Qiu,Xianlong Wang,Xuebin Zhu,Bangchuan Zhao,Yuping Sun
Low softening-point pitch (LP) is regarded as a promising precursor for hard carbon anodes in sodium-ion batteries due to its low cost and high yield. However, the sodium storage performance of LP-derived carbon materials is always undesirable owing to the high degree of graphitization. Herein, a self-coated hard carbon (HC@SC) material with relative disordered structure was developed from LP precursor using synergistic deep pre-oxidation and self-coating strategies. The oxygen-crosslinked structure endowed in the deep pre-oxidation process effectively hinders carbon layer growth during the subsequent pyrolysis, promoting the formation of disordered hard carbon structure with larger interlayer spacing. Additionally, the soft carbon self-coating layer is introduced onto the hard carbon surface to improve its electrical conductivity and then enhance the sodium diffusion. Consequently, the HC@SC anode delivers an initial charge capacity of 311.9 mAh g −1 at 0.05 A g −1 and a rate capability of 109.7 mAh g −1 at 5 A g −1 , and preserves a high-capacity retention of 90.0 % after 1000 cycles at 1 A g −1 . Furthermore, the NNMO//HC@SC full cell exhibits desirable cycling stability and rate performance.
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 Thermal Science and Technology
·
2016
·
IF 0.611
Xu JI,Haili LI,Congbin LENG,Ming LI,Rongkang FAN,Jiaxing LIU
A stabilized composite phase change material for heat storage was synthesized by adding expanded graphite and disodium hydrogen phosphate to sodium acetate trihydrate with the method of vacuum adsorption. The effects of expanded graphite and disodium hydrogen phosphate were experimentally explored and the thermal properties of the composite material were characterized. The experimental results indicated that disodium hydrogen phosphate was an excellent nucleating agent for sodium acetate trihydrate. With addition of 1% disodium hydrogen phosphate, the supercooling degree of sodium acetate trihydrate decreased significantly from over 38°C to about 0.5°C. The addition of expanded graphite was also helpful to ameliorate supercooling of sodium acetate trihydrate. Furthermore, phase separation of sodium acetate trihydrate could be effectively eliminated by adding expanded graphite. Compared with the disodium hydrogen phosphate/sodium acetate trihydrate composite material (without addition of expanded graphite), the heat storage/release time of the expanded graphite/disodium hydrogen phosphate/sodium acetate trihydrate composite material was shorten by 75.3%. With the optimal ingredient proportion of 8% expanded graphite, 1% disodium hydrogen phosphate and 91% sodium acetate trihydrate, the composite material became a stabilized 'solid-solid' phase change energy storage material with excellent thermal performance. Its thermal conductivity was greatly improved, and the phase change latent heat reached 233.5kJ/kg. The supercooling and phase separation phenomenon were no longer observed.
研究领域:
材料科学
·
热能工程
✓ 已验证
DOI
高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 10
·1652
·
IF 5.719
Qi Chen,Haichao Li
Carbon nanostructures (carbon nanotubes, nano carbon spheres, layered carbon nanostructures) were prepared from a sodium dodecyl sulfonate @ sodium chloride system. Sodium dodecyl sulfonate was used as a carbon source. A sodium chloride crystal in the carbonization procedure was used to separate ordered aggregates of sodium dodecyl sulfonate. The results show that different carbon nanostructures were prepared at low concentrations (1CMC~5CMC) by controlling the concentration of sodium dodecyl sulfonate, such as nano carbon spheres and carbon nanotubes, and that layered carbon nanostructures were formed at high concentrations (10CMC). The prepared carbon nanostructures were characterized by transmission electron microscopy, fluorescence spectrometry and Raman spectrometry. The results of this experiment show that the surfactant @ salt system is a potential method for the preparation of carbon nanostructures.
研究领域:
材料科学
·
纳米技术
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2018
·
IF 8.097
Liming Ling,Ying Bai,Zhaohua Wang,Qiao Ni,Guanghai Chen,Zhiming Zhou,Chuan Wu
Sodium alginate (SA) is investigated as the aqueous binder to fabricate high-performance, low-cost, environmentally friendly, and durable TiO2 anodes in sodium-ion batteries (SIBs) for the first time. Compared to the conventional polyvinylidene difluoride (PVDF) binder, electrodes using SA as the binder exhibit significant promotion of electrochemical performances. The initial Coulombic efficiency is as high as 62% at 0.1 C. A remarkable capacity of 180 mAh g–1 is achieved with no decay after 500 cycles at 1 C. Even at 10 C (3.4 A g–1), it remains 82 mAh g–1 after 3600 cycles with approximate 100% Coulombic efficiency. TiO2 electrodes with SA binder display less electrolyte decomposition, fewer side reactions, high electrochemistry reaction activity, effective suppression of polarization, and good electrode morphology, which is ascribed to the rich carboxylic groups, high Young’s modulus, and good electrochemical stability of SA binder.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Yifei Wu,Xinpeng Gao,Peng Hu,Yanbo Li,Fengping Xiao
Room temperature sodium-sulfur (RT Na-S) batteries are considered as advanced energy storage technology due to their low cost and high theoretical energy density. However, challenges such as the growth of sodium dendrite and dissolution of sodium polysulfides significantly hinder the electrochemical performance. Herein, we developed a propylene carbonate (PC)-based electrolyte with Methyl 2-Fluoroisobutyrate (MFB) as an additive. The ester group in the MFB additive is capable of participating in and reconfiguring the coordination of their Na + solvated structures, thereby lowering the desolvation barrier and regulating the Na anode’s interfacial reaction and nucleation behavior. The polar C−F bond at the other end helps to reduce the lowest unoccupied molecular orbital (LUMO) energy of the MFB additive, enabling the preferential decomposition of MFB to form the F-rich inorganic phase strong polar solid electrolyte interphase (SEI), contributing to the inhibition of Na dendrite growth, the accumulation of dead Na. In addition, NaF-riched cathode electrolyte interphase (CEI) was also observed on sulfur-based cathode, which can effectively inhibited the shuttle effect. Consequently, the developed RT Na-S battery exhibit excellent electrochemical performance.
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 Energy Chemistry
·
2024
·
IF 14
Xin Jin,Fujie Li,Xuguang Zhang,Guangrong Zeng,Xuehua Liu,Bin Cai,Chao Wang,Xiu Song Zhao
Layered sodium trititanate (Na 2 Ti 3 O 7 , NTO) is a promising anode material for sodium-ion batteries (NIBs) for large-scale energy storage applications because of its relatively low charge potential and low cost. However, NTO suffers from unsatisfactory structural stability against cycling and poor electron conductivity. Herein, an isovalent doping strategy using Sn 4+ to partially replace Ti 4+ is demonstrated for improving the cycling stability and rate capability of NTO. The isovalent doping of Sn 4+ does not alter the valence state of Ti 4+ , thus maintaining the lattice integrality and structural stability. Moreover, the Sn 4+ dopant creates more Na + -preferable travel channels and expands the interlayer spacing, thus increasing Na + diffusivity. As a result, a Sn 4+ -doped Na 2 Ti 3 O 7 (NSTO) electrode exhibits a reversible Na + storage specific capacity of 176 mA h g −1 at 0.1C and an ultra-long cycling life with 80.2% capacity retention after 5000 cycles at 1C, far outperforming the undoped and aliovalent-doping NTO electrodes reported in the literature. In addition, the NSTO electrode delivers a rate capability of 102 mA h g −1 at 5C, higher than that of the NTO electrode (62 mA h g −1 ). In situ X-ray diffraction characterization results reveal that Na + storage in NSTO undergoes a partial solid-solution reaction mechanism, which is completely different from the two-phase transition mechanism of NTO. Density functional theory calculation results demonstrate that Sn 4+ doping strengthens the Ti–O bond, contributing to structural stability. This work provides a robust approach to significantly improving the electrochemical performance of NTO-based anode materials for developing long-life NIBs.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Yunfeng Tan,Jiangzhou Qin,Shengquan Chang,Shengqiang Ma,Linan Su,Nengsheng Liu,Quanlin Zhao,Xintao Wang,Chenxi Li,Jinmao Ma,Kun Wu,Zhengfang Ye
The treatment of wastewater containing sodium azide (NaN 3 ) poses a major challenge to environmental protection and public safety. In this study, a multi-scale analysis method integrating experimental optimization, machine learning modeling and theoretical calculation was proposed. The mechanism and optimal conditions of NaN 3 removal by sodium hypochlorite (NaClO) oxidation were systematically studied. Through the combination of single factor experiment design and response surface method (RSM), the optimum treatment conditions were determined as follows: dilution factor was 300, NaClO dosage was 3.5 mL, and pH value was 6.0. Under these conditions, the removal rate of NaN 3 reached 96.53 %. In addition, the developed BP-GA hybrid neural network model showed excellent prediction performance (R 2 = 0.98805). After further optimization of process parameters, the removal rate of NaN 3 increased to 98.2 %. Density functional theory (DFT) calculations revealed the significant effects of pH value and intermediate HOCl on the reaction efficiency, and clarified the microscopic mechanism of the reaction. This study optimizes the treatment process of wastewater containing NaN 3 , which provides a theoretical basis for the design of a new efficient oxidation system and is of great significance for promoting sustainable wastewater treatment.
研究领域:
环境科学
·
化学工程
·
计算化学
✓ 已验证
产品关联
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2025
·
IF 5.6
Lun Ma,Qiming Liu,Huijuan Zhu,Yilin Wang,Han Su,Jie Wang
Na₄Fe₃(PO₄)₂(P₂O₇) (NFPP) has attracted growing interest as a cathode material for sodium-ion batteries (SIBs) because of its non-toxic nature, economic cost, and robust structure. However, its practical application is limited by relatively poor electronic conductivity, which affects its electrochemical performance. The introduction of Al³⁺ ions, characterized by their smaller ionic radius, leads to lattice contraction. This not only minimizes lattice distortion during the sodium ion transport process but also significantly enhances the structural stability of the material. Furthermore, coating the material with a carbon layer significantly boosts its electrical conductivity. Consequently, the optimized NFPP exhibits superior sodium-ion diffusion, enhanced electronic conductivity, and improved structural integrity. Research findings show that the formulated non-stoichiometric, carbon-coated Na₄.₄Fe₃.₄Al₀.₁(PO₄)₂.₅P₂O₇/C cathode delivers exceptional electrochemical performance.It achieves a high specific capacity of 133 mAh g⁻¹ at 0.2 C, maintains good rate capability with 91 mAh g⁻¹ at 20 C, and shows excellent cycling stability, preserving 88 % of its initial capacity after 2500 cycles at 50 C.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2025
·
IF 9.7
Beibei Ma,Yawen Liang,Xiaokai Ma,Wenjie Wang,Chengcheng Miao,Guanqi Yu,Qizhao Wang,Chunyang Xu,Xinwei Cui
The rising demand for cost-effective and safe energy storage systems has ignited strong global interest in advanced cathodes that surpass lithium-ion batteries in practical applications. Herein, we propose a composite material in which five ions, Ti 4+ , Mn 2+ , Fe 2+ , Zr 4+ , and Mo 6+ , are doped into the lattice of Na 3 V 2 (PO 4 ) 3 and a uniform carbon-coating layer is applied to its surface, resulting in the formation of high-entropy doped Na 3 V 2 (PO 4 ) 3 @C materials (HENVP@C). When employed as the cathode material for Sodium-ion batteries (SIBs) and hybrid lithium/sodium-ion batteries (HLSIBs), HENVP@C shows remarkable Li + /Na + storage capabilities. The results of electrochemical performance tests on half-cells reveal that HENVP@C exhibits a high capacity, along with excellent cycle life and stability. High-entropy doping effectively stabilizes the NASICON structure of HENVP@C, enhances ionic conductivity, and optimizes ion diffusion kinetics, particularly improving its dual-ion pseudocapacitive storage capability. In addition, the surface carbon coating improves the electronic conductivity of the material. The insights presented in this work provide new ideas for designing cathode materials for SIBs and HLSIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Water Process Engineering
·
2025
·
IF 6.7
Zheng-Jun Fu,Bo-Zhi Chen,Kai Yu,Jian-Guo Hu,Pengli Chen,Hui-Qin Zhang,Mei-Ling Liu,Shi-Peng Sun
Aiming to address the challenges of high treatment cost and low recycling degree in coal-to-ethylene glycol wastewater, this study conducted research on the application of nanofiltration membranes for salt separation in the resource utilization plant of coal-to-ethylene glycol wastewater, and studied the operation parameters of the nanofiltration system in this resource utilization process. First, membrane elements were screened based on the water quality characteristics of the wastewater. Subsequently, systematic characterization of the selected membrane elements was conducted, followed by long-term pilot-scale experiments to determine operational parameters for the project. During 3 months of continuous operation, the rejection rate of Na 2 SO 4 was >98 %, and the rejection rate of NaCl was <10 %. Among them, the mass ratio of NaCl and Na 2 SO 4 on the permeate side is 30, and the mass ratio of NaCl and Na 2 SO 4 on the concentrated water side is 3, which effectively realizes the separation of Na 2 SO 4 and NaCl. Through the reverse osmosis + evaporation + crystallization process, Na 2 SO 4 products with a purity of 98.4 % and NaCl products with a purity of 98.9 % were finally obtained. This study provides a reasonable process route for the recycling of coal chemical wastewater and verifies the feasibility of salt separation of nanofiltration system in the recycling of coal chemical wastewater, to provide corresponding guidance for the resource utilization of concentrated brine.
研究领域:
环境科学
·
化工工程
·
水资源管理
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2022
·
IF 20.831
Qiao Wang,Chuang Yu,Liping Li,Xiaoqing Liu,Xin Zhang,Guichen Gao,Yaowen Wang,Guangshe Li
Solid-state sodium batteries (SSSBs) display great potential in scale energy storage for their safety, cost and sustainability. However, it is a great challenge to achieve high ionic conductivity and temperature adaptability for most sodium-ion solid electrolytes. Here, we first demonstrate that Sc 3+ -doped Na 3 Zr 2 Si 2 PO 12 (NASICON) is a promising electrolyte for a wide temperature range utilizing in SSSBs from 0 to 80 °C. Optimal Na 3.4 Zr 1.6 Sc 0.4 Si 2 PO 12 shows a superior Na-ion conductivity, up to 1.77 × 10 −3 S cm −1 at room temperature, and excellent Na metal compatibility, as confirmed by a symmetrical cell test. Furthermore, the solid-state sodium battery with the configuration of Na 3 V 2 (PO 4 ) 3 /Na 3.4 Zr 1.6 Sc 0.4 Si 2 PO 12 /Na maintains a discharge capacity of 98.7 mAh g −1 at 1C after 300 cycles at room temperature. Even at 0 °C, the battery still displays a reversible capacity of 99.2 mAh g −1 at 0.1C after 100 cycles. Through the structure analysis and ex-situ and in-situ electrochemical characterizations, the reasons that dominate the excellent performance of the assembled all-solid-state sodium battery with NASICON electrolytes are initially revealed.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）