IONICS
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2018
·Vol. 25
·期 5
·2211-2219
·
IF 2.347
Chen Si,Gao Lin,Zhang Lulu,Yang Xuelin
Four types of mesoporous Na 2 Ti 3 O 7 (NTO) microspheres have been successfully prepared utilizing different concentrations of NaOH treatment. The specific surface areas and pore size distributions of NTO can be well controlled by means of adjusting the amount of NaOH additives. In the meanwhile, the corresponding electrochemical performance has been detected and analyzed. It is concluded that the 3 M-NTO sample prepared with 3 M NaOH solution exhibits the best electrochemical performance. We consider that the less or excess amount of NaOH might not be beneficial to building the most optimal model for efficient Na + ion storage. The addition of NaOH less than 2 M leads to the relatively low surface areas and pore volume, bringing about limited contact areas between active materials and Na + ions as well as unsatisfied specific capacity. On the other hand, the excess augment of NaOH is reversely detrimental to the improvement of electrochemical performance probably owing to the fragile construction of NTO caused by the abundant mesopore distribution.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Xinyue Zhao,Chenhui Yang,Xiongri Gan,Li Gong,Xingbin Yan,Igor Zhitomirsky,Kaiyuan Shi
The conventional fabrication of electrodes for sodium-ion batteries (SIB) involves mixing of the active material with additives and tape-casting on metallic current collectors. Herein, an electrophoretic deposition (EPD) method has been developed to fabricate composite electrodes without using volatile and toxic solvents as well as binders. The approach is based on the EPD of amorphous FePO4 and multiwall carbon nanotube (MWCNT) from aqueous suspensions. The fabrication of FePO4 suspensions containing MWCNT and the controlled co-deposition of both materials are pivotal for the EPD of composites. Multiple dispersants with different properties are investigated as the charging, dispersing, and film-forming agents. The deposition yield of EPD films is measured under various conditions. The atomic force microscopy analysis, engaged with thermogravimetric tests, provides evidence for the formation of adhesive and conductive FePO4/MWCNT films. The dispersant concentration is optimized in order to achieve high capacity. The composite electrode, prepared by EPD, delivers a discharge capacity of 142.2 mA h g–1 at a current of 10 mA g–1. Another important finding is the possibility to fabricate full-cell SIBs, containing presodiated hard carbon as the anode and a deposited FePO4/MWCNT cathode. The deposited films show adequate capacitance retention as the charge–discharge current increased and stable cycling performance.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xin Hou,Tianyu Li,Yanling Qiu,Mingqin Jiang,Qiong Zheng,Xianfeng Li
Electrolyte plays an important role in conducting sodium ions and carrying out chemical/electrochemical reactions. However, the impact mechanism of microscopic solvation structure remains vague but is significant for the electrolyte design. Here we reveal that the inner relationship between solvation structure and electrochemical reaction is manifested intuitively by manipulating the anions in the solvated shell, which determines Na storage kinetics and SEI evolution process. The result elucidates the weak coulomb interaction between PF 6 − and Na + could promote Na + transport number in bulk liquid and Na storage kinetics. And it could induce PF 6 − to reduce preferentially and facilitate additive to enter solvation structure, thereby forming a thin&compact&protective SEI with layered morphology. The excellent SEI would protect anode effectively, inhibiting decomposition of solvents and improving battery performances. As expected, 5 Ah Na 3 V 2 (PO 4 ) 3 -hard carbon pouch-type batteries with well-matched PF 6 − -based electrolyte display a high specific energy of 129 Wh kg −1 , a superior rate capability with capacity retention of 90 % at 5 C and cycling stability with retention of 86.82 % at 1 C after 700 cycles.
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
·
2023
·
IF 4.1
Linna Qin,Shoudong Xu,Zhonghua Lu,Li Wang,Liang Chen,Ding Zhang,Jinlv Tian,Tao Wei,Jiaqi Chen,Chunli Guo
Cellulose , as it has high content and low cost along with the absence of heteroatoms, can well balance the cost and structural consistency issues raised by mass production. Herein, the cellulose-derived hard carbon as an anode material for sodium-ion batteries with high performance has been prepared by a one-step direct carbonization process using pure cellulose as a precursor in the temperature range of 900–1400 °C. Moreover, the effect of carbonization temperature on the microstructure and the sodium battery storage properties of cellulose-derived hard carbon was investigated by structural and morphological characterization, as well as electrochemical performance testing. The results show that the CHC-1300 electrode material displays a high reversible capacity of 373.2 mAh g −1 at 30 mA g −1 , and exhibits a desirable cycling stability with 89.7 % capacity retention even after 200 cycles. Furthermore, cyclic voltammetry technique (CV) at different scan rates and galvanostatic intermittent titration technique (GITT) have been employed to explore the sodium storage mechanism and sodium storage kinetics of cellulose-derived hard carbon. The results exhibit that the rate performance of the electrode material would be affected by the low apparent diffusion coefficient of sodium ions in the plateau region . Besides, a full-cell has been assembled with CHC-1300 as the anode and Na 0.83 Mg 0.11 Ni 0.22 Mn 0.63 O 2 (NMNM) as the cathode. The CHC-1300//NMNM full-cell shows high energy density and good cycling stability, which could verify the practical application of the cellulose-derived hard carbon.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2018
·Vol. 25
·期 4
·971-975
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IF 5.16
Qi Pan,Hui Chen,Zhenguo Wu,Yuan Wang,Benhe Zhong,Li Xia,Hai-Ying Wang,Guanwei Cui,Xiaodong Guo,Xuping Sun
Graphical Nanowire anode material : WP nanowires on carbon cloth (WP/CC) act as a high-performance anode material for sodium-ion batteries. The WP/CC shows a superior sodium storage capability (502 mA h g −1 at 0.1 A g −1 , see figure) compared with its powder (80 mA h g −1 at 0.1 A g −1 ). Moreover, this anode has a long lifespan at 2 A g −1 with excellent capacity retention of 99 % after 1000 cycles. The design and development of electrode materials with high specific capacity and long cycling life for sodium-ion batteries (SIBs) is still a critical challenge. In this communication, we report the development of tungsten phosphide (WP) nanowire on carbon cloth (WP/CC) as an anode for SIBs. The WP/CC exhibits superior sodium storage capability with 502 mA h g −1 at 0.1 A g −1 . Moreover, this anode is capable of delivering a long lifespan at 2 A g −1 with an excellent capacity retention of 99 % after 1000 cycles.
研究领域:
材料科学
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能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
IONICS
·
2017
·Vol. 23
·期 7
·1783-1791
·
IF 2.062
Cao JiaLi,Ni Liang,Qin CanCan,Tang YueFeng,Chen YanFeng
Hierarchical Na 2 FeP 2 O 7 spheres with nanoparticles were successfully fabricated by a facile spray drying method. A relatively low drying temperature was introduced in order to form a carbon layer on the surface. As a cathode material for sodium-ion batteries, it delivered a reversible capacity of 84.4 mAh g −1 at 0.1 C and showed excellent cycling and rate performance (64.7 mAh g −1 at 5 C). Furthermore, a full sodium battery was fabricated using SP-Na 2 FeP 2 O 7 as the cathode and hard carbon as the anode, suffering almost no capacity loss after 400 cycles at 1 C. Due to its superior electrochemical property and the low materials cost, Na 2 FeP 2 O 7 is becoming a promising cathode material for large-scale energy storage systems.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ChemElectroChem
·
2019
·Vol. 7
·期 3
·631-641
·
IF 3.975
Wei Nie,Xiaolin Liu,Qingmei Xiao,Liuxin Li,Guoxin Chen,Dong Li,Min Zeng,Shengwen Zhong
Graphical Upcycling rice husks : Hard carbon materials derived from rice husks with hierarchical porous and high specific surface area structures were successfully prepared by a low-cost carbonization approach. The hard carbon material synthesized at 800 °C was exploited as an anode material for sodium-ion batteries, which results in promising enhancement in all electrochemical parameters. This work represents a promising technology for low-cost and high stable sodium-ion storage. Compared with the cathode materials, the research on the anode materials of the sodium-ion batteries has lagged behind. Therefore, development of the anode materials with high capacity, long life, and excellent rate properties is the key to unlocking the practical application for sodium-ion batteries. This study presents the preparation of hierarchical porous hard carbon as an active anode material from rice husks. The as-synthesized materials are characterized by X-ray diffraction, N 2 adsorption, Raman spectra, scanning electron microscopy and transmission electron microscopy. These porous hard carbon materials exhibit a high specific surface area and are promising for reversible sodium storage. Galvanostatic studies show that the specific initial capacities of all samples were in the range of 130–300 mA h g −1 at a current density of 100 mA g −1 between 0.01 V and 2.3 V. Compared to the other samples, the hard carbon materials prepared at 800 °C from rice husk (RHPC-800) can deliver a high reversible capacity of 274 mA h g −1 at a current density of 25 mA g −1 , maintain a capacity of approximately 260 mA h g −1 , and retain 92.7 % of its capacity after 500 cycles. This excellent electrochemical performance of the as-prepared RHPC-800 material is attributed to the high specific surface area and low charge transfer resistance.
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
Ran Sui,Guangtao Zan,Ming Wen,Weina Li,Zihui Liu,Qingsheng Wu,YongQing Fu
Transition metal sulfides and oxides with high theoretical capacities have been regarded as promising anode candidates for a sodium-ion battery (SIB); however, they have critical issues including sluggish electrochemical kinetics and poor long-term stability. Herein, a dual carbon design strategy is proposed to integrate with highly active heterojunctions to overcome the above issues. In this new design, CoS2/CoO hollow dodecahedron heterojunctions are sandwiched between open framework carbon-spheres (OFCs) and a reduced graphene oxide (rGO) nanomembrane (OFC@CoS2/CoO@rGO). The CoS2/CoO heterojunctions effectively promote electron transfer on their surface and provide more electrochemical active sites through their hierarchical hollow structures assembled by nanodots. Meanwhile, the dual-carbon framework forms a highly conductive network that enables a better rate capability. More importantly, the dual carbon can greatly buffer volume expansion and stable reaction interfaces of electrode material during the charge/discharge process. Benefitting from their synergistical effects, the OFC@CoS2/CoO@rGO electrode achieves a high reversible capacity of 460 mAh g–1 at 0.05 A g–1 and still maintains 205.3 mAh g–1 even when current density is increased by 200 times when used as an anode material for SIBs. Their cycling property is also remarkable with a maintained capacity of 161 mAh g–1 after 3500 charging/discharging cycles at a high current density of 1 A g–1. The dual-carbon strategy is demonstrated to be effective for enhanced reaction kinetics and long-term cycling property, providing siginificant guidance for preparing other high-performance electrode materials.
研究领域:
材料科学
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能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ELECTRONIC MATERIALS
·
2022
·Vol. 51
·期 12
·6626-6636
·
IF 2.047
Huang Jiajie,Li Xiaoyue,Jiang Shiqi,Liu Cheng,Lu Mixue,Yang Yefeng
Cobalt diselenide (CoSe 2 ) has stimulated increasing research interest in the field of sodium-ion batteries (SIBs) because of its relatively high theoretical capacity and affordable cost. Nevertheless, its sodium storage performance and practical application are largely hampered by inferior electrical conductivity, severe volumetric variation, and pulverization during the repeated cycling process. In this work, we report the fabrication of hybrid spheres of Fe-doped CoSe 2 embedded in a carbon shell (denoted as Fe-CoSe 2 /C), which uses a facile solvothermal and subsequent carbonization/selenization approach. The carbon shell produced from the precursor of CoFe-glycerate (CoFe-Gly) effectively enhances the electrical conductivity and mitigates the structural stress, while the modulated doping of certain amounts of Fe in CoSe 2 facilitates the transfer of electrons and the diffusion of ions in the composite. As a result, the optimal Fe-CoSe 2 /C-2 electrode exhibits good rate performance (388 mAh g −1 at 5 A g −1 ) and outstanding cycling durability (501 mAh g −1 at 1 A g −1 after 500 cycles, retention of 93.5%), suggesting the great potential of Fe-CoSe 2 /C hybrid spheres to serve as promising anode materials for high-performance SIBs. Graphical Abstract
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Jiawen Yan,Ke Sang,Xiaohan Jiang,Qiming Li,Fuyi Jiang,Yanli Zhou
In this study, amorphous MoS 3 -modified porous Co 4 S 3 -embedded N,S co-doped carbon polyhedron (Co 4 S 3 @NSC/MoS 3 ) was rationally prepared via a multi-step method. One-dimensional linear-like MoS 3 with a high specific capacity of 894 mAh g −1 and abundant active sites compensated for the low capacity of Co 4 S 3 , thus enhancing the sodium ion storage capacity of the entire electrode. Moreover, three-dimensional N,S co-doped carbon networks (NSC) significantly inhibited large volumetric fluctuations in Co 4 S 3 and MoS 3 , thereby sustaining the structural stability and enhancing the electron transfer efficiency. As a new anode material for sodium-ion half batteries, the constructed Co 4 S 3 @NSC/MoS 3 with rapid Na + diffusion and charge transfer kinetics demonstrated better sodium storage properties than Co 4 S 3 @NSC. At a rate of 0.5 A g −1 over 100 cycles, the reversible specific capacity of Co 4 S 3 @NSC/MoS 3 reached 594 mAh g −1 . Even when cycled at a rate of 2 A g −1 for 600 cycles, the charge capacity was stable at 435 mAh g −1 . The rate performance of Co 4 S 3 @NSC/MoS 3 was also found to be remarkable; when the rate increased to 10 A g −1 , the average capacity was retained at 382 mAh g −1 . Apart from half cells, reduced graphene oxide (rGO)-modified Na 3 V 2 (PO 4 ) 3 composite (Na 3 V 2 (PO 4 ) 3 @rGO) was used as the cathode material to match with Co 4 S 3 @NSC/MoS 3 . The assembled full batteries were analyzed and their electrochemical properties were discussed. They also exhibited outstanding rate capability and high-rate long-life cyclic property. Even at 1 A g −1 over 500 cycles, the discharge capacity was stably maintained at 246 mAh g −1 . The outstanding sodium storage properties of Co 4 S 3 @NSC/MoS 3 mainly depended on the cooperative effects of MoS 3 and Co 4 S 3 @NSC, indicating the potential application of Co 4 S 3 @NSC/MoS 3 in energy storage fields.
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
ACS Applied Energy Materials
·
2024
·
IF 5.4
Tianming Zhu,Haoyuan Liu,Chenhao Sun,Zhen Ma,Xiaoxi Zuo,Junmin Nan
In comparison to the well-known separator of lithium-ion batteries (LIBs), there are unique characteristics and requirements for the separator of sodium-ion batteries (SIBs) to affect the electrochemical performance and safety. In this work, a composite separator (AP@NSIO) is successfully fabricated by constructing a fully encapsulated sodium silicate (NSIO) ceramic sheath on the fiber surface of a low-cost, recyclable airlaid paper (AP) matrix using a facile solution immersion method. Due to the comprehensive coating of sodium silicate on the matrix fiber, the prepared AP@NSIO separator not only has excellent mechanical strength and remarkable wettability but also maintains thermal dimensional stability at 250 °C and is nonflammable in flames. Moreover, the AP@NSIO separator exhibits a high porosity of ∼50.6%, an electrolyte uptake of ∼298.9%, an ion conductivity of 2.02 mS cm–1, and a sodium-ion transfer number of 0.91. The Na3V2(PO4)3 (NVP)|AP@NSIO|Na battery has an excellent capacity retention of 94.2% (96.8 mAh g–1) after 300 cycles at a high current density of 5C and maintains almost 100% Coulombic efficiency. These results indicate that the AP@NSIO separator is a potential candidate for application in safe and high-performance SIBs, and a strategy is provided for designing functional separators for SIBs.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2024
·Vol. 121
·期 17
·e2311075121
·
IF 9.4
Lanfang Que,Fuda Yu,Jihuai Wu,Zhang Lan,Yutong Feng,Ruizheng Zhao,Zhihao Sun,Zhuo Yang,Hao Luo,Dongliang Chao
Voltage oscillation at subzero in sodium-ion batteries (SIBs) has been a common but overlooked scenario, almost yet to be understood. For example, the phenomenon seriously deteriorates the performance of Na3V2(PO4)3 (NVP) cathode in PC (propylene carbonate)/EC (ethylene carbonate)-based electrolyte at −20 °C. Here, the correlation between voltage oscillation, structural evolution, and electrolytes has been revealed based on theoretical calculations, in-/ex-situ techniques, and cross-experiments. It is found that the local phase transition of the Na3V2(PO4)3 (NVP) cathode in PC/EC-based electrolyte at −20 °C should be responsible for the oscillatory phenomenon. Furthermore, the low exchange current density originating from the high desolvation energy barrier in NVP-PC/EC system also aggravates the local phase transformation, resulting in severe voltage oscillation. By introducing the diglyme solvent with lower Na-solvent binding energy, the voltage oscillation of the NVP can be eliminated effectively at subzero. As a result, the high capacity retentions of 98.3% at −20 °C and 75.3% at −40 °C are achieved. The finding provides insight into the abnormal SIBs degradation and brings the voltage oscillation behavior of rechargeable batteries into the limelight.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）