RSC Advances
·
2023
·Vol. 13
·期 10
·6983-6992
·
IF 3.9
Yiqiong Peng,Lingzhi Zeng,Shuai Dai,Feng Liu,Xi Rao,Yongping Zhang
Self-assembled lithium iron phosphate (LiFePO4) with tunable microstructure is an effective way to improve the electrochemical performance of cathode materials for lithium ion batteries. Herein, self-assembled LiFePO4/C twin microspheres are synthesized by a hydrothermal method using a mixed solution of phosphoric acid and phytic acid as the phosphorus source. The twin microspheres are hierarchical structures composed of primary nano-sized capsule-like particles (about 100 nm in diameter and 200 nm in length). The uniform thin carbon layer on the surface of the particles improves the charge transport capacity. The channel between the particles facilitates the electrolyte infiltration, and the high electrolyte accessibility enables the electrode material to obtain excellent ion transport. The optimal LiFePO4/C-60 exhibits excellent rate performance with discharge capacity of 156.3 mA h g−1 and 118.5 mA h g−1 respectively at 0.2C and 10C, and low temperature performances with discharge capacity of 90.67 mA h g−1 and 66.7 mA h g−1 at −15 °C and −25 °C, respectively. This research may provide a new pathway to improve the performance of LiFePO4 by tuning the micro-structures by adjusting the relative content of phosphoric acid and phytic acid.
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
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Yi Jiang,Hao Zhu,Chunlai Yu,Xu Cao,Lin Cheng,Ruhong Li,Shaoqiang Yang,Changsong Dai
Effects of different specials carbon materials on the performance of negative plates were studied. The addition of carbon materials P1 and P2 greatly improved the high-rate partial-state-of-charge (HRPSoC) cycle performance of the batteries. A negative plate completed 18489 HRPSoC micro-cycles in the first cycle-set when the concentration of P2 was 0.9%. Special properties are required for the carbon materials to be used as additives to the negative electrode materials. Firstly, the carbon material added to the negative electrode should have a good binding force with lead and lead sulfate. Secondly, the carbon material should have a large specific surface area and a larger pore volume. Addition of bismuth sulfide can inhibit the hydrogen evolution of the lead-carbon negative plates. Negative electrodes modified with a C/Bi 2 S 3 composite exhibited good low temperature performance.
研究领域:
材料科学
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电化学
·
能源存储技术
✓ 已验证
DOI
高影响因子
Asia-Pacific Journal of Chemical Engineering
·
2022
·Vol. 18
·期 1
·e2841
·
IF 1.777
Chunxiang Ma,Xiaoning Wang,Yijun Song,Haoyu Hu,Wei Li,Zhijian Qiu,Yongpeng Cui,Wei Xing
LiFePO 4 is one of the most widely used cathode materials for lithium-ion batteries, and the low-temperature performance of LiFePO 4 -based batteries has been widely studied in recent years. Herein, a 3.5 Ah pouch-type full battery was assembled using LiFePO 4 as the cathode and artificial graphite as the anode. For the LiFePO 4 -based cathode, carbon-coated aluminum foil was selected as the current collector, and a 0D–1D–2D multi-scale conductive network was introduced into the electrode. Notably, both the carbon-coated current collector and novel conductive network could significantly reduce the internal resistance of the LiFePO 4 -based battery, thus improving its electrochemical dynamics and low-temperature performance. This paper provides a theoretical basis for the development of low-temperature LiFePO 4 -based batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Ziwei Gan,Xiaohe Ren,Mingdong Liu,Nengze Wang,Tianning Pian,Mengxuan Sun,Chunyang Jia,Zhijie Li
Layered vanadium-based materials are considered to be the most promising cathode materials for aqueous zinc ion batteries (AZIBs) due to their abundant valence changes and high theoretical capacity. However, low intrinsic conductivity, poor low temperature performance and generally poor cycle life hinder their further application. This study proposes a 3D conductive network by compositing vanadium-based materials with graphene to improve the conductivity for rapid electron transfer. Meanwhile, the interleaving of vanadium-based materials with the conductive network of graphene constructs a buffer layer, which can effectively mitigate the structural collapse caused by Zn 2+ insertion/extraction during the charge and discharge processes, and significantly increase the long cycle life of the battery. The H 2 V 3 O 8 /rGO conductive network buffer layer is directly synthesized by a one-step hydrothermal method. The H 2 V 3 O 8 /rGO-100//Zn batteries show a specific capacity of up to 528.3 mAh/g at 0.1 A/g. Even at a high working current density of 20 A/g, the specific capacity is still 137.2 mAh/g, and it can remain 88.8 % after 12,000 cycles. Moreover, at the low temperature of −20 °C, the H 2 V 3 O 8 /rGO-100//Zn still maintain a high specific capacity of 346.6 mAh/g at 0.1 A/g, and its specific capacity can remain 86.2 % after 20,000 cycles at 10 A/g. Even at −30 °C, it can stably work for 3,000 cycles at 1 A/g with almost no capacity degradation, showing good low temperature adaptability. Therefore, the present work provides a novelty strategy of designing cathode materials for ZIBs with excellent performance.
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
Nano Energy
·
2024
·
IF 16.8
Shuai Li,Hongyu Liu,Luojia Zheng,Chuntao Ma,Hailong Yu,Xiaodong Wu,Xiaobin Niu,Liping Wang
As the “blood” of batteries, the electrolyte is generally expected to be designed reasonably to meet the demands of stable energy storage in high energy density batteries. This study introduces a rational design for localized high-concentration electrolytes (LHCEs) by incorporating the weakly coordinating diluent 1, 1, 2, 2-tetrafluoro-1-methoxyethane (TFM) to modulate the solvation of Li + alongside the anion and solvent 1, 2-diethoxyethane (DEE). The resulting LiFSI-DEE/2TFM electrolyte (1 M LiFSI in DEE/TFM at a ratio of 1:2, volume) demonstrates a significant efficacy in suppressing the dissolution of lithium polysulfides (LiPSs) while maintaining a good ionic conductivity. Moreover, this electrolyte facilitates the formation of a stable cathode-electrolyte interphase (CEI) and promotes uniform plating/stripping of Li + at the lithium anode. Consequently, based on this electrolyte, the Li/FeS 2 cells exhibit an exceptional specific capacity and a good cycling stability from room temperature to −20°C. Notably, even at −20°C, over 80 % of the room-temperature specific capacity (692.7 mAh g −1 @150th) is retained for the cell using LiFSI-DEE/2TFM, showing its robust performance in challenging environments. Furthermore, the Li/FeS 2 cell also demonstrates an outstanding durability at high current density (≥ 2 C) under room temperature.
研究领域:
材料科学
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电化学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 39
·2302537
·
IF 13.3
Haozhen Yang,Junlong Huang,Shaohong Liu,Yongqi Chen,Zongheng Cen,Chenguang Shi,Yuheng Lu,Ruowen Fu
Carbonaceous materials are widely investigated as anodes for potassium-ion batteries (PIBs). However, the inferior rate capability, low areal capacity, and limited working temperature caused by sluggish K-ions diffusion kinetics are still primary challenges for carbon-based anodes. Herein, a simple temperature-programmed co-pyrolysis strategy is proposed for the efficient synthesis of topologically defective soft carbon (TDSC) based on inexpensive pitch and melamine. The skeletons of TDSC are optimized with shortened graphite-like microcrystals, enlarged interlayer spacing, and abundant topological defects (e.g., pentagons, heptagons, and octagons), which endow TDSC with fast pseudocapacitive K-ion intercalation behavior. Meanwhile, micrometer-sized structure can reduce the electrolyte degradation over particle surface and avoid unnecessary voids, ensuring a high initial Coulombic efficiency as well as high energy density. These synergistic structural advantages contribute to excellent rate capability (116 mA h g −1 at 20 C), impressive areal capacity (1.83 mA h cm −2 with a mass loading of 8.32 mg cm −2 ), long-term cycling stability (capacity retention of 91.8% after 1200 h cycling), and low working temperature (−10 °C) of TDSC anodes, demonstrating great potential for the practical application of PIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Siru He,Huimin Yuan,Peide Zhu,Xingzhu Wang,Baomin Xu
Enhancing the energy output of batteries in low temperatures is critical to broadening the application areas of advanced electronic devices, which can be accomplished by utilizing high-voltage cathodes to match lithium metal anode, optimizing electrolyte electrochemical windows and forming stable solid electrolyte interphases to provide facile ion-transmission kinetics at low temperature. Herein, we demonstrate a fluorinated ester co-solvent electrolyte, which applies 1 M LiPF 6 in an ethyl 4,4,4-trifluoro butyrate/fluoroethylene carbonate (FEC) (4/1 by volume ratio) that jointly satisfies high voltage cathode and lithium metal anode reversibility at required ambient. The performance of the battery is due to the rapid dissociation of Li + and the formation of a fluorine-rich inorganic electrolyte interface in the fluorinated solvent. Therefore, the fluorinated ester co-solvent electrolyte system can provide 209.9 mAh g −1 , 194.8 mAh g −1 , and 175.5 mAh g −1 when discharged at room temperature, −20 ℃ and −40 ℃, respectively, those far exceeds the performance of carbonate electrolytes. This work advances the development of low-temperature lithium metal 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
JOURNAL OF ALLOYS AND COMPOUNDS
·
2025
·
IF 6.3
Yan Jiang,Ping Wang,Ji Li,Xianfa Zhang,Yingming Xu,Hui Zhao,Xiaoli Cheng,Shan Gao,Lihua Huo
The porous and tubular structure is conducive to improving performance of sensing materials. At present, how to obtain sensitive materials with unique porosity and high surface activity by green, low-cost and simple synthesis methods is still a challenge. In this work, novel In 2 O 3 porous microtubes were obtained by water etching of MIL-68-In and calcination methods for the first time. The as-prepared microtubes exhibit excellent NO 2 sensitivity at 50 ℃ (S=156–3 ppm NO 2 ), and the limit of detection is 50 ppb. The sensor also has good NO 2 detection ability in the actual environment. The excellent NO 2 sensing performance at low temperature is closely related to high surface activity of In 2 O 3 porous microtubes. Combined with TPD, in-stiu DRIFT and XPS technologies, the NO 2 sensing mechanism was detailed analyzed. This work provides useful guidance for constructing high performance NO 2 sensor. The excellent NO 2 sensing performance at low temperature makes a positive contribution to promoting the application of metal oxide sensors in environmental detection.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Polymer Chemistry
·
2025
·
IF 3.9
Hao Li,Qiang Liu,Yiming Du,Yanyan Liu,Wei Zhang,Xingyou Tian,Hua Wang
Two innovative molecular design strategies for epoxy curing agents to address the inherent brittleness and cryogenic limitations of conventional epoxy systems are introduced. A silane-modified curing agent (DETA-Si) and a flexible-chain-engineered curing agent (NBOn) were synthesized to achieve unprecedented mechanical–electrical–thermal synergies. The DETA-Si/EP composite demonstrates a record-breaking elongation at break of 125% (22× improvement over unmodified systems) while maintaining ultralow dielectric loss (tan δ < 0.04) and thermal stability (Td = 236 °C). The NBOn series, incorporating rigid benzene rings and tunable aliphatic chains, exhibits exceptional cryogenic resilience: 18% elongation at 298 K with >50% ductility retention after 24-hour immersion in liquid nitrogen (77 K). Conductive composites cured with EP/NBO10 show stable resistance (±5%) under 30-day cryogenic exposure. Free volume engineering, validated via WLF modeling, underpins the enhanced low-temperature performance. These advancements establish a paradigm for epoxy resins in flexible electronics operating under extreme conditions, such as flexible sensors and polar climate devices.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Dehai Meng,Haozhi Duan,Shijie Wu,Xiaodan Ren,Shuxia Yuan
Lithium iron phosphate (LiFePO 4 ) is one of the most important cathode materials for high-performance lithium-ion batteries in the future due to its high safety, high reversibility, and good repeatability. However, high cost of lithium salt makes it difficult to large scale production in hydrothermal method . Therefore, it is urgent to reduce production costs of LiFePO 4 while maintaining the unique advantages of hydrothermal methods. In this work, the lithium iron phosphate powders (LFP-twi) with low Fe-Li anti-site defect concentration and inhibition along the direction [010] was constructed by hydrothermal reaction with low lithium usage. As a result, this allows the material to have an excellent reversible capacity (163.6 mAhg −1 at 0.1 C), ultra-high-rate capability (120 mAhg −1 at 10 C), and noticeable low-temperature performance (130 mAhg −1 at - 20 ℃ and 0.1 C). These findings open a new avenue for the development of high-density current and low-temperature resistant LiFePO 4 batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CATALYSIS TODAY
·
2020
·
IF 5.825
Genkuo Nie,Yiying Dai,Junjian Xie,Xiangwen Zhang,Lun Pan,Ji-Jun Zou
Fuel blending generally exhibits better low-temperature flow properties (i.e. low viscosity, low freezing point) than pure component fuel. Here, a fuel bending containing bicyclohexane and (cyclopentylmethyl)cyclohexane was synthesized directly by hydroisomerization of cyclohexylphenol to reduce the freezing point. The selectivity of (cyclopentylmethyl)cyclohexane formed by isomerization is enhanced through inhibiting the quick hydrogenation of intermediates using mixing acid catalyst and metal catalyst. Zeolite with strong Brønsted acid site and big surface area, such as HZSM-5 is better for the isomerization. Catalyzed by mixture of Pd/C and HZSM-5, the obtained fuel blending improves the freezing point from 2.6 °C to−22 °C compared with pure bicyclohexane, meanwhile keep the high density of 0.880 g/mL unchanged. The improved low-temperature property is contributed to the formation of (cyclopentylmethyl)cyclohexane. Moreover, the pathways of isomerization and its competition with hydrodeoxygenation are also investigated.
研究领域:
化学工程
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 22
·7441-7450
·
IF 6.4
Chen Chen,Yueqin Li,Changhao Qian,Lin Han,Zichun Lu,Lingke Liu
Although electrically conductive hydrogels based on conductive polymers hold promise for flexible and high-performance supercapacitors, it is still a challenge for such devices to maintain high capacitance with temperature change, especially under subzero conditions. Herein, conductive polymer poly(3,4-ethylenedioxythiophene) (PEDOT) decorated with redox-active anthraquinone-2-sulfonic acid sodium (AQS) on the surface is homogeneously dispersed in a poly(acrylic acid) (PAA) hydrogel, which reinforces the conductivity and the stretchability of the obtained AQS–PEDOT/PAA hydrogel electrode. Particularly, with the containing of the H2SO4 + KCl electrolyte, the hydrogel is temperature tolerant and endows the assembled supercapacitor with a wide working temperature of −30 to 90 °C. Due to the extra energy storage contribution of AQS, the device exhibits a high capacitance of 466.5 mF cm−2, a maximum energy density of 41.47 μW h cm−2 and an exceptional cyclic stability of 90% retention after 5000 cycles. Very interestingly, the AQS–PEDOT/PAA electrode shows a remarkable solar-thermal conversion, which significantly boosts the electrochemical performance of the device under subzero conditions. Under solar illumination, the device shows a capacitance enhancement of 39.6% at −30 °C as compared with the device in the dark. This work provides an innovative strategy to spur the sluggish performance of conductive polymer-based hydrogel supercapacitors for practical applications.
研究领域:
材料科学
·
能源存储
·
柔性电子
✓ 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）