Small
·
2015
·Vol. 11
·期 37
·4959-4969
·
IF 8.368
Wenjing Qian,Jingyue Zhu,Ye Zhang,Xiao Wu,Feng Yan
The one-step synthesis of porous carbon nanoflakes possessing a 3D texture is achieved by cooking (carbonization) a mixture containing two condiments, sodium glutamate (SG) and sodium chloride, which are commonly used in kitchens. The prepared 3D porous carbons are composed of interconnected carbon nanoflakes and possess instinct heteroatom doping such as nitrogen and oxygen, which furnishes the electrochemical activity. The combination of micropores and mesopores with 3D configurations facilitates persistent and fast ion transport and shorten diffusion pathways for high-performance supercapacitor applications. Sodium glutamate carbonized at 800 °C exhibits high charge storage capacity with a specific capacitance of 320 F g −1 in 6 m KOH at a current density of 1 A g −1 and good stability over 10 000 cycles.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
Small
·
2019
·Vol. 15
·期 46
·1903873
·
IF 10.856
Ya-Qian Wu,Hui-Xian Yang,Yu Yang,Hao Pu,Wen-Jie Meng,Rui-Ze Gao,Dong-Lin Zhao
SnS 2 has been widely studied as an anode material for sodium-ion batteries (SIBs) based on the high theoretical capacity and layered structure. Unfortunately, rapid capacity decay associated with volume variation during cycling limits practical application. Herein, SnS 2 /Co 3 S 4 hollow nanocubes anchored on S-doped graphene are synthesized for the first time via coprecipitation and hydrothermal methods. When applied as the anode for SIBs, the sample delivers a distinguished charge specific capacity of 1141.8 mAh g −1 and there is no significant capacity decay (0.1 A g −1 for 50 cycles). When the rate is increased to 0.5 A g −1 , it presents 845.7 mAh g −1 after cycling 100 times. Furthermore, the composite also exhibits an ultrafast sodium storage capability where 392.9 mAh g −1 can be obtained at 10 A g −1 and the charging time is less than 3 min. The outstanding electrochemical properties can be ascribed to the enhancement of conductivity for the addition of S-doped graphene and the existence of p–n junctions in the SnS 2 /Co 3 S 4 heterostructure. Moreover, the presence of mesopores between nanosheets can alleviate volume expansion during cycling as well as being beneficial for the migration of Na + .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
✓ 已验证
DOI
高影响因子
Small
·
2023
·Vol. 20
·期 20
·2309809
·
IF 13.3
Tong Wang,Lingling Liu,Yanwei Wei,Yihan Gao,Shun Wang,Deqi Jia,Wei Zhang,Jingquan Sha
The microstructure of hard carbons (HCs) including interlayer distance and lateral ab direction and pore size distribution plays a key role in regulating the sodium ions storage performance. Herein, by employing the gelatinous agar as a model precursor, series P-doping HCs (P-HC- x , x = 1, 2, 3, 4) are facilely prepared in batches via controllably regulating its crosslinking state by phytic acid (PA) at a low carbonization temperature of 750 °C, in which PA plays three roles (acid, flame retardant, and P-doping precursor) in promoting the final structure of P-HC-x. Among those, the puparium like P-HC-2 with expanded carbon interlayer distance of 3.91 Å and shortened lateral ab direction of 9.4 nm delivers a high reversible capacity of 394 mAh g −1 at 0.1 A g −1 with high increased slope capacity of 363 mAh g −1 as well as an ultrafast charge-discharge feature and a superlong cycle life. Pairing with the Na 3 V 2 (PO 4 ) 3 cathode, the fabricated sodium-ion full cells exhibit the 132 mAh g −1 reversible capacity at 0.1 A g −1 , and 86% capacity retention after 100 cycles. This work successfully develops slope-dominated high-performance carbon anode, which will provide new insights for the microstructure regulation and design of other precursor-derivedHCs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2019
·
IF 0
Yunjie Li,Xiucai Sun,Zhenjie Cheng,Xiao Xu,Jun Pan,Xianfeng Yang,Fang Tian,Yanlu Li,Jian Yang,Yitai Qian
Transitional metal chalcogenides , one important family of promising candidates as electrode materials for sodium-ion batteries, gradually convert to Cu 2 S or Cu 2 Se in the discharge/charge processes, due to electrochemically driven copper diffusion. Thus, their performances after the electrochemical activation, actually come from copper chalcogenides . In this regard, the thorough investigation on the electrochemical properties of copper chalcogenides is important and necessary for the rational design of transitional metal chalcogenides . Here, mesoporous Cu 2-x Se nanocrystals synthesized by a simple solvothermal reaction, are used as a model. They experience the complicated intercalation reaction and the conversion reaction upon cycling, as supported by in-situ / ex-situ techniques and first-principle calculations. All these reactions are highly reversible, leading to 96.1% of the theoretical capacity. These nanocrystals preserve 88% of the initial capacity after 3000 cycles at 5 A g −1 . Even at 10 A g −1 , the capacity is still kept as 92.1% of that at 0.1 A g −1 . In full cells, the nanocrystals without any pre-sodiation and pre-activation, present a lifespan up to 2000 cycles at 0.5 A g −1 and a capacity retention about 74.2%.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
✓ 已验证
DOI
CARBON
·
2019
·
IF 7.466
Cai Gao,Jianze Feng,Jingrou Dai,Yuanyuan Pan,Yulong Zhu,Wenhang Wang,Yunfa Dong,Linfang Cao,Lu Guan,Lei Pan,Han Hu,Mingbo Wu
The sluggish kinetics in anode materials severely prevents the practical use of lithium/sodium-ion batteries in many current and emerging applications. To overcome this bottleneck, we report a facile and scalable strategy to construct nitrogen and phosphorus co-doped carbon nanosheets with abundant electron-rich regions rendering a strong cation attraction and expanded interlayer spacing for fast lithium/sodium diffusion, which allows excellent rate capable anodes for lithium/sodium-ion batteries. Specifically, the as-prepared nanosheets afford outstanding pseudocapacitive behavior with superior rate capacities of 379 and 140 mA h g −1 at a high current density of 5.0 A g −1 for lithium and sodium storage, respectively, while the calendar life can be as long as thousands of cycles. The extraordinary rate capability is further demonstrated through combined use of quantitative kinetics analysis, galvanostatic intermittent titration technique measurements and theoretical simulation. Considering the extraordinary electrochemical performance and comprehensive analysis of pseudocapacitive lithium/sodium storage mechanism, this work holds great potential to serve as a fundamental reference for exploring robust pseudocapacitive electrode materials.
研究领域:
材料科学
·
电化学
·
纳米能源材料
·
储能技术
·
电池化学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2018
·Vol. 10
·期 6
·2804-2811
·
IF 7.233
Caifu Dong,Lijun Guo,Yanyan He,Limei Shang,Yitai Qian,Liqiang Xu
Cobalt sulfides are attractive as intriguing candidates for anodes in SIBs and LIBs owing to their unique chemical and physical properties. In this study, a precursor of Co1−xS with a uniform and hollow nanospherical architecture is obtained with a high yield via a mild solvothermal method in the presence of 2-methylimidazole at first. Then, Co1−xS, Co1−xS/C (ultrafine Co1−xS nanoparticles embedded in the shells of the nitrogen-doped porous carbon hollow nanosphere), and Co1−xS@C (Co1−xS nanoparticles entirely covered by an external amorphous carbon layer) were selectively fabricated via direct calcination or PPy coating & calcination of the obtained precursor. Co1−xS/C shows best electrochemical performance than the other two materials as anodes for sodium-ion batteries (SIBs). Besides the excellent rate performance, a high reversible discharge capacity of 320 mA g−1 can be retained after 130 cycles at 1 A g−1. The impressive performance may be attributed to the unique structure, higher conductivity, and more active sites of Co1−xS/C. In addition, 559 mA h g−1 was maintained after 100 cycles at 500 mA g−1 when the Co1−xS/C composite was applied as an anode in lithium-ion batteries (LIBs). The high reversible capacity, excellent cycle stability combined with the facile synthesis procedure render Co1−xS/C a prospective anode material for rechargeable batteries.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
无机化学
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2024
·Vol. 171
·期 1
·010512
·
IF 3.1
Manyang Xu,Yanli Zhang,Weiwei Shao,Xiaoning Li,Jiakun Zhou,Wenzhang Zhou,Wenjuan Zhang,Yan Feng,Ding Zhang,Kehua Dai
The performance of sodium-ion batteries critically depends on the cathode materials used, making it essential to explore and optimize suitable candidates. Among them, O3-structured NaNi0.33Fe0.33Mn0.33O2 has emerged as one of the most promising cathode materials due to its outstanding electrochemical properties. However, there still exists a knowledge gap regarding the detailed synthesis conditions and the comprehensive performance of the full cell using this material. In this study, we investigated the influence of synthesis temperature, time, and sodium content on the electrochemical performance and charge-discharge kinetics of O3-structured NaNi0.33Fe0.33Mn0.33O2, prepared via the PVP-gel combustion method. Through systematic analysis, we elucidated the impact of these synthesis parameters on the material’s properties and battery performance. The results revealed that the optimized conditions led to a cathode material with superior electrochemical performance, exhibiting enhanced capacity with 139 mAh g−1 at 0.1 C and 96 mAh g−1 at 10 C. Additionally, a full cell using the optimized cathode material was studied, showing promising performance. This research sheds light on the significance of synthesis parameters in tailoring the electrochemical properties of O3-structured NaNi0.33Fe0.33Mn0.33O2 for sodium-ion batteries. The insights gained from this study hold valuable implications for the further development of practical sodium-ion battery cathode materials.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机功能材料
·
电池技术
✓ 已验证
DOI
高影响因子
Energy Technology
·
2019
·Vol. 7
·期 11
·1900754
·
IF 3.163
Shikun Cheng,Qiang Ru,Zhenglu Shi,Yuqing Gao,Yang Liu,Xianhua Hou,Fuming Chen,Francis Chi-Chung Ling
Plant oil–inspired 3D flower-like Zn 3 V 3 O 8 nanospheres coupled with nitrogen doped (N-doped) carbon synthesized via the microemulsion/calcination strategy are used as anodes for lithium-/sodium-ion batteries (LIBs/SIBs). The synergistic interaction between the unique 3D flower-like structure and the existence of N-doped carbon can provide enough space to buffer volume expansion during the Li + /Na + intake/outlet process and enhance conductivity, respectively. Thus, the material delivers progressive electrochemical performance. Specifically, the Zn 3 V 3 O 8 nanospheres exhibit a reversible specific capacity of 1140.6 mAh g −1 after 200 cycles for LIBs and 113.0 mAh g −1 after 400 cycles for SIBs at a current density of 200 mA g −1 . Furthermore, the Zn 3 V 3 O 8 nanospheres electrode owns rate capability for LIBs such as 933.8, 847.9, 780.8, and 664.1 mAh g −1 at elevated current densities of 200, 400, 800, and 1600 mAh g −1 , respectively. In addition, it delivers reversible capacities of 207.5, 119.2, 74.1, and 42.7 mAh g −1 at 100, 200, 500, 1000, and 2000 mA g −1 for SIBs, respectively.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Yang-Yang Hu,Yu-Lin Bai,Xue-Yan Wu,Xiao Wei,Kai-Xue Wang,Jie-Sheng Chen
Molybdenum disulfide (MoS 2 ), employed for rechargeable sodium-ion batteries (SIBs) as an anode material , has attracted considerable attention attributing to its high Na + intercalation capability. Nevertheless, MoS 2 suffers from low conductivity and large volume expansion upon the discharging/charging. In this work, MoS 2 nanoflakes were dispersed into a three-dimensional (3D) porous carbon framework by utilizing salt as hard template, obtaining a 3D porous MoS 2 /carbon composite. When employed as an anode material for SIBs, the composite shows large specific capacity, good rate capability and cycling stability. A large capacity of 361 mAh g −1 is achieved at 5.0 A g −1 and a capacity of 372 mAh g −1 is still well maintained at 0.5 A g −1 after 200 cycles. The 3D interconnected porous carbon framework is believed to improve the electrochemical performance through accelerating the transportation of electrons and ions, as well as suppressing the volume expansion upon the Na + insertion and preventing the active materials aggregation.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Qingsong Liu,Jinlong Gao,Chuntian Cao,Geping Yin,Zaixing Jiang,Mingyuan Ge,Xianghui Xiao,Wah-Keat Lee,Jiajun Wang
Sodium ion batteries (SIBs) are considered a potential energy storage technology due to their low cost and the abundance of sodium resources. Numerous strategies have been made to address the remaining challenges such as low electronic conductivity, huge volume change, and sluggish sodium ions kinetics. In spite of impressive advances, a comprehensive understanding of the microstructure-stability correlation remains elusive. Here, the three-dimensional (3D) Fe 3 S 4 flower-like hierarchical materials constructed from two-dimensional (2D) nanosheet building units were synthesized via a facile and cost-effective method. Instead of materials synthesis and performance evaluation, more attentions have been paid on the underlying coupling mechanism between microstructure design, surface chemistry and 3D electronic/ionic transport pathways. It found that the thin and stable SEI layer generated by ether-based electrolytes contributes to the stable surface chemistry and fast interfacial Na + ion transport, while 3D hierarchical structure enables short diffusion distance, volume change accomodation as well as stabilizing SEI layer. Taking advantage of the inherent high electronic conductivity in Fe 3 S 4 , we have demonstrated the paramount importance of the synergistic strategy to improve the stability of SIBs through X-ray nanotomography. This work explicitly illuminate the electrochemical stability mechanisms of 3D hierarchitectures and resolves new strategies to rational design SIBs anodes.
研究领域:
材料科学
·
电化学
·
纳米材料
·
能源存储
·
固体物理
·
界面化学
✓ 已验证
DOI
高影响因子
Corrosion Communications
·
2024
·
IF 0
Zhiyuan Feng,Jiao Li,Keqi Huang,Guoqiang Liu,Huanhuan Bai,Xin Huang,Jun Qi,Zhengwei Tang,Penghai Xu,Xiaofei Yang,Zheng Qu,Guozhe Meng
Within the realm of corrosion protection methods for Al alloys, sol-gel technique has garnered increasing attention. However, conventional sol-gel methodologies cannot provide adequate long-lasting corrosion protection to Al alloys when exposed to chloride-rich solutions. This paper introduces an innovative approach to substantially augment the corrosion resistance of aluminum alloys through utilization of polydopamine (PDA)-modified sol-gel films. Effort was made to fabricate a PDA-modified sol-gel coating and a systematic investigation was conducted thereof. Long-term corrosion performance of this coating in 3.5 wt.% NaCl solution was evaluated through electrochemical impedance spectroscopy (EIS). Results show that the low-frequency impedance of the PDA-modified sol-gel coating remains significantly high at 7.9 × 10 5 Ω·cm 2 , even after 36 d of immersion in 3.5 wt.% NaCl medium, indicative of excellent protective properties. It notably surpasses low-frequency impedance of the unmodified coating, which registers at 2.5 × 10 4 Ω·cm 2 . The incorporation of PDA into the sol-gel coating, facilitated by adsorption and diffusion mechanisms, serves to fill micrometer- and nanometer-scale defects of the coating, thereby markedly enhancing their compactness. Furthermore, despite its modest thickness of 9 μm, the PDA-modified coating exhibits enduring corrosion protection capabilities.
研究领域:
材料科学
·
表面工程
·
腐蚀与防护
·
纳米材料
·
电化学
✓ 已验证
DOI
APPLIED SURFACE SCIENCE
·
2024
·
IF 6.3
Jie Song,Ye Xu,Yujue Wang,Shenghu Li,Siyi Yin,Wanglai Cen,Dan Xiao,Qian Zhao,Xicui Zhang,Yan Meng
Hard carbons are significant in sodium-ion batteries (SIBs) and potassium-ion batteries (PIBs). However, the structural defects of hard carbons lead to poor rate performance and cycling stability, which need further improvement. The waste cooking oil was used as the precursor to synthesize 3D carbon nanosheets (NWCOC) with amino nitrogen functional groups, multi-layered pores, and expanded interlayer spacing. The excellent electrochemical properties of NWCOC were investigated and it was demonstrated that NWCOC can significantly improve the adsorption of Na + /K + on hard carbons, substantially enhancing the embedding/de-embedding of Na + /K + , reducing the diffusion distance of ions and electrons, and improving their adaptability to volume changes. In situ XRD and Raman characterization reveal that the Na storage mechanism of NWCOC is mainly based on adsorption/intercalation-filling. Combined with density functional theory, it is shown that the porous structures doped with nitrogen have a greater propensity for ion adsorption, resulting in increased ion capture and storage. As expected, NWCOC650 exhibits high capacities of 489.4 and 388.3 mAh/g in SIBs and PIBs. NWCOC650 displays superior performance in the Na 3 V 2 (PO 4 ) 3 /NWCOC650 full cell, achieving a capacity of 107.84 mAh/g. This work presents a new perspective on the synthesis and mechanisms of high-performance anodes for SIBs and PIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）