JOURNAL OF POWER SOURCES
·
2019
·
IF 7.467
Pengfei Zhou,Junying Weng,Xiaolan Liu,Yanyan Li,Li Wang,Xiaozhong Wu,Tong Zhou,Jin Zhou,Shuping Zhuo
To improve the electrochemical performance of CF x for lithium primary batteries , a ball milling treatment of CF x and urea with various mass ratios is carried out in this paper. It is shows that the weight ratio of urea/CF x significantly affects the electrochemical performance of the ball-milled CF x . Electrochemical tests show that the modified CF x material exhibits excellent electrochemical performance with much enhanced rate capacity, improved discharge platform, and lowered initial potential delay compared with the untreated CF x . In detail, when the weight ratio of urea/CF x is 5, the material delivers a discharge capacity of 550.6 mAh g −1 with a high power density of 10309 W kg −1 (at 5000 mA g −1 and 25 °C) and exhibits an excellent electrochemical stability at low temperature of 5 °C (power density up to 5922.5 W kg −1 at 3000 mA g −1 ). The outstanding electrochemical performance is mainly due to the synergistic effect of enlarged interlayer distance , decreased particle size, and increased surface area, which resulting in improved the electrochemical reaction activity, decreased reaction resistance, and facilitated lithium ions diffusion.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Lang Bai,Jiangmin Jiang,Xingchen Li,Yuqing Zhang,Lei Zhang,Lingbang Qiu,Libo Wang,Yanhua Cui,Quanchao Zhuang
Fluorinated carbon (CF x ) is considered to be a promising cathode material for lithium primary batteries, which has an ultra-high theoretical energy density of 2180 Wh kg −1 . However, the C-F bonds in CF x materials are strongly covalent, leading to a low intrinsic conductivity and poor electrochenical performance. In this work, a high entropy electrolyte (HE) has proposed to maintain the original discharge platform and exhibit a second discharge voltage platform that appeared around 1.7 V, which effectively improves the specific capacity of Li/CF x batteries (1035 mAh g −1 ). This significant improvement can be attributed to the chelation of the dioxygen atoms in the solvent with the Li + , resulting in the solvated Li + being co-intercalated into the lamellar structure of the graphite. Notably, the Li/CF x batteries in the HE electrolyte exhibit higher specific capacity than the single lithium salt at −40 °C and 80 °C (539 mAh g −1 , 1132 mAh g −1 ). This is mainly due to high entropy changes the point of the electrolyte solidifies, thus avoiding capacity loss caused by solid-phase electrolyte clogging the electrode holes. This work provides an efficient and reliable method for the design of Li/CF x batteries with high specific capacity.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Gaobang Chen,Yong Fan,Tianhui Yu,Muhammad Shoaib,Azim Khan,Yifan Liu,Xian Jian
The practical application of high-rate lithium/fluorinated carbon (Li/CF x ) primary batteries faces challenge of relatively slow electrode reaction kinetics limited by inert C-F bond and strong polarity. Herein, an effective microwave-induction strategy was developed to regulate C-F bond for 80C high-rate Li/CF x battery with suppressed polarization. The as-mentioned microwave method was carried out in the alcohol-based solvent for uniformly modify CF x , including precise defluorination, C-F bond regulation, surface functional groups and carbon quantum dots. Precise defluorination contains the conversion of C-F bond to semi-ionic C-F bond while preserving C-F 2 and C-F 3 . During the process of C-F bond regulation, hydroxyl groups is grafted onto the surface of CF x to increase the wettability and electronegativity of the electrode. Compared with raw CF x , the Li/CF x batteries using microwave-modified CF x achieved high discharge rate of 80C possessing a high power density of 134.091 kW/kg. In addition, the optimal Li/CF x battery possesses a large specific capacity increase ratio of 142.6 % at 50C. This microwave-induction approach for modifying CF x in ethanol-based solvent provides a facile and effective pathway to design high-rate Li/CF x battery.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Energy
·
2023
·
IF 9.3
Jian Wang,Yifan Liu,Guilu Qin,BaoShan Wu,Zongkai Yan,Nasir Mahmood,Xian Jian,Huakun Liu
The low intrinsic conductivity of carbon monofluoride (CF x ) extremely limits the high-power application of lithium/carbon monofluoride (Li/CF x ) primary batteries. Herein, silver nanowires were grown in situ on the surface of CF x material by an aldehyde reduction method in polyhydric alcohol. The interface interaction between silver nanowires (Ag NWs) and the surface of CF x material was studied. Ag NWs@CF x hybrids modulate the electronic structure of CF x and enhance the electrochemical activity of C–F bonds, thus increasing the availability of F atoms to participate in the discharge reaction. The electrochemical performance results show that the voltage platform, specific capacity, and energy density of the Li/CF x batteries were enhanced with a certain concentration of Ag NWs on the CF x surface. The 10% Ag NWs@CF x sample achieved a power density of 10376.09 W/kg and an energy density of 840 Wh/Kg at a discharge rate of 8C, which is significantly better than the pristine CF x . The performance of Li/CF x batteries is improved by building an Ag conductivity chain and enhancing the electrochemical activity of C–F bonds through a simple hydrothermal method , which effectively expands the application prospects of Li/CF x batteries in the field of high-power 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
JOURNAL OF POWER SOURCES
·
2023
·
IF 9.2
Zhenkai Tang,Jie Zou,Dezhu Zhang,Xinlan Chen,Ying Yu,Kang Huang,Zhi Xu
To improve the power density and energy density of vanadium flow batteries (VFBs), a novel Ti x O y -loaded carbon felt (Ti x O y -CF) electrode is designed, fabricated, and applied. Ti x O y (consisted of TiO 2 and Ti 4 O 7 ) has the advantages of easy preparation, high electrical conductivity , good stability, etc. It is evenly distributed on carbon felt and shows high catalytic efficiency on V 2+ /V 3+ redox couple to facilitate the electrochemical kinetics of the vanadium redox reactions . As a result, the VFB assembled with Ti x O y -CF achieves a high energy efficiency of 82.0% at a current density of 200 mA cm −2 , and maintains 77.9% energy efficiency at 260 mA cm −2 . In addition, the VFB with Ti x O y -CF exhibits good stability and high capacity retention within 400 cycles at 100 mA cm −2 . This work provides a new perspective for the development of highly active electrodes for VFBs.
研究领域:
材料科学
·
电化学
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
COLLOIDS AND SURFACES B-BIOINTERFACES
·
2025
·
IF 5.6
Huixing Li,Xiong Shuai,Yanyan Chen,Jiaxing Xiong,Zhongxing Zou,Shuping Peng,Fangwei Qi,Cijun Shuai
Electrical stimulation displayed tremendous potential in promoting nerve regeneration. However, the current electrical stimulation therapy required complex traversing wires and external power sources, which significantly limited its practical application. Herein, a self-powered nerve scaffold based on primary battery principle was gradient printed by laser additive manufacturing technique. Specifically, poly-L-lactide (PLLA) containing Ag 2 O and Zn nanoparticles was prepared as the positive and negative electrode of the scaffold respectively, and PLLA/PPy was prepared as the middle conductive segment. In simulated body fluid, the negative electrode underwent oxidation to lose electrons and become positively charged. The lost electrons were transferred to the positive segment in a directed and orderly manner via the middle conductive segment, causing the positive electrode to be enriched electrons and become negatively charged. Subsequently, two segments can generate a potential difference to form an electric field, further generating current. Not merely, the redox process can release Ag + and Zn 2+ to endow the scaffold with antibacterial properties. Results showed that the scaffold could generate a current of up to 17.2 μA, which promoted a 14-fold increase in calcium ion influx and increased the mRNA expression of neuronal markers MAP2 by 24-fold. Moreover, the antibacterial rates of the scaffold against E. coli and S. aureus could reach 92.6 % and 91.9 %, respectively.
研究领域:
生物医学工程
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材料科学
·
神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
GIANT
·
2024
·
IF 5.4
Ziyue Zhao,Lingchen Kong,Jinxu Sun,Yu Li,Wei Feng
Fluorinated carbon (CF x ) compounds have extensive applications in lithium primary battery cathodes owing to their high energy density. In this investigation, a novel CF x compound offering superior electrochemical properties was synthesized via a low-temperature fluorination process, utilizing Pluronic F127 as a template agent and microporous carbon spheres produced through soft template-assisted high-temperature carbonization and chemical activation as precursors, and by regulating the amount of soft template F127 added. The reduction in microsphere size, narrower particle size distribution, and introduction of defects contribute to augmenting the molar ratio of F to C (F/C) of CF x while preserving the electrochemical activity of C-F bonds. The specific capacity of fluorinated polymer-derived microporous carbon spheres (FPMCSs) with a high fluorination degree rivals that of commercial fluorinated graphite (FG). The microsphere morphology and microporous structure not only furnish abundant sites for fluorination reactions in electrode processes but also facilitate Li + diffusion, ensuring ample rate capability. The synthesized FPMCSs exhibited a peak specific capacity of 1079 mAh g –1 and a maximum energy density of 2679 Wh kg –1 (substantially surpassing the 2180 Wh kg –1 of commercial FG). Hence, the prepared FPMCSs underscore the significance of selecting suitable carbonaceous materials and designing structures deliberately, showing promising potential for achieving high energy density in CF x cathodes in the future, employing readily available and cost-effective raw materials.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Zaihua Duan,Zhen Yuan,Yadong Jiang,Qiuni Zhao,Qi Huang,Yajie Zhang,Bohao Liu,Huiling Tai
The power generation humidity sensors based on the principles of triboelectricity , piezoelectricity and ion diffusion have been proposed in recent years. However, these power generation humidity sensors usually have complex preparation process and application limitation. Here we develop a simple Cu/NaCl paper/Al power generation (CPG) humidity sensor based on primary battery structure. Combined with the hydrophilicity of paper and the chemical reactions of primary battery, the CPG humidity sensor can spontaneously output voltage and shows good humidity sensing properties at 41.1–91.5% relative humidity (RH). Specifically, a single CPG humidity sensor can output 0.58 V at 91.5% RH with a power of 1.33 μW. Benefiting from good humidity sensing performance and material safety, the CPG humidity sensor has been proved to have potential applications in respiratory rate, diaper monitoring and non-contact switch. Through the series integration of 8 CPG humidity sensors, it can realize an output voltage of 4.21 V and charge the capacitor, proving the potential self-powered characteristic of the CPG humidity sensor. This research not only proposes a simple, low-cost and eco-friendly power generation humidity sensor, but also opens a new pathway for power generation humidity sensor.
研究领域:
材料科学
·
能源技术
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2019
·Vol. 16
·期 3
·1906462
·
IF 10.856
Pengfei Sun,Panxing Bai,Zifeng Chen,Hai Su,Jixing Yang,Kang Xu,Yunhua Xu
Lithium primary batteries are still widely used in military, aerospace, medical, and civilian applications despite the omnipresence of rechargeable Li-ion batteries. However, these current primary chemistries are exclusively based on inorganic materials with high cost, low energy density or severe safety concerns. Here, a novel lithium-organic primary battery chemistry that operates through a synergetic reduction of 9,10-anthraquinone (AQ) and fluoroethylene carbonate (FEC) is reported. In FEC-presence, the equilibrium between the carbonyl and enol structures is disabled, and replaced by an irreversible process that corresponds to a large capacity along with methylene and inorganic salts (such as LiF, Li 2 CO 3 ) generated as products. This irreversible chemistry of AQ yields a high energy density of 1300 Wh/(kg of AQ) at a stable discharge voltage platform of 2.4 V as well as high rate capability (up to 313 mAh g −1 at a current density of 1000 mA g −1 ), wide temperature range of operation (−40 to 40 °C) and low self-discharge rate. Combined with the advantages of low toxicity, facile and diverse synthesis methods, and easy accessibility of AQ, Li-organic primary battery chemistry promises a new battery candidate for applications that requires low cost, high environmental friendliness, and high energy density.
研究领域:
材料科学
·
电化学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 49
·2303149
·
IF 13.3
Ping Li,Zhe Cheng,Jialu Liu,Lukang Che,Yingke Zhou,Enmin Xu,Xiaohui Tian,Zhongzhi Yuan
The electrode/electrolyte interfaces play an important role in the electrochemical reaction kinetics to alleviate the severe polarization and voltage hysteresis in lithium primary batteries. Herein, C 5 F 5 N is proposed as an electrolyte additive to tune the characteristics of the electrode/electrolyte interfaces. The Li/CF x primary battery with C 5 F 5 N additive exhibits an excellent discharge-specific capacity of 981.4 mAh g −1 (0.1 C), a remarkable high-rate capability of 598 mAh g −1 (15 C), and an outstanding energy/power density of 1068.7 Wh kg −1 /24362.5 W kg −1 . It also shows remarkable storage performance with 717.2 mAh g −1 at 0.1 C after storage at 55 °C for 2 months. The excellent performance of the Li/CF x batteries is closely related to the improved and stable Li 3 N/LiF-rich homogeneous interfaces induced by the C 5 F 5 N additive, which results in uniform distribution of Li + flux, facilitated electrochemical kinetics, and increased rate capability of Li/CF x battery. Therefore, C 5 F 5 N is expected to be a promising electrolyte additive, and the related electrode/electrolyte interface engineering provides an effective and facile strategy to increase the performance of the lithium primary battery.
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 HYDROGEN ENERGY
·
2014
·
IF 2.93
Yufei Wang,Shuanjin Wang,Min Xiao,Dongmei Han,Yuezhong Meng
By the solution casting method, a novel porous membrane has been prepared for VRB by doping sulfonated poly(fluorenyl ether ketone) (SPFEK) with imidazole , and then imidazole was washed out by extraction with solution. The proton conductivity of porous membrane increased with increasing the content of imidazole, but proton/vanadium ion (H/V) selectivity decreased. Layer-by-layer (LbL) technique was used to improve the porous membrane with high selectivity. Moreover, the performance of VRB using SPFEK-20.7imidazole-(PDDA/PSS) 8 membrane which is doped with 20.7 wt.% content of imidazole and then removed imidazole, and then deposited with eight LbL bilayers exhibits the highest columbic efficiency (CE) of 92.5% at 30 mA cm −2 .
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Weizhuo Xu,Qing Wang,Zhaopeng Sun,Xinyue He,Wei Sun,Bingjie Zhou,Wei Liu
Hydrogen is considered an important future energy but still faces storage and transportation bottlenecks. Formic acid (FA) acts as a potential organic hydrogen storage material, requiring a fast and effective method for hydrogen evolution. Herein, we propose a galvanic catalysis strategy, which fabricates the Pt||C galvanic cell structured catalyst in the phosphomolybdic acid solution (PMo 12 ) to enhance electron transfer and accelerate FA oxidation under mild conditions. PMo 12 serves as an electron carrier for electrocatalytic hydrogen production. Pt provides active sites for FA adsorption and the carbon support with a high specific surface area absorbs PMo 12 , forming an internal electric field between carbon and Pt, and resulting in the galvanic effect that drives the directional electrons transfer along the Pt → C pathway. The mass activity of Pt for FA decomposition reaches 32.82 A mg −1 Pt and a turnover frequency (TOF) of 540,768 h −1 , which is 298 times higher than the mass activity of commercial Pt/C. Subsequently, coupled with anodic regeneration of reduced PMo 12 , the hydrogen production in a flow electrolytic cell achieves a remarkably low electricity consumption (1.39–2.30 kW∙h Nm −3 H 2 ) and Faraday efficiency over 97 %. This study offers valuable insights into the design of advanced catalytic systems for hydrogen production from organic molecules.
研究领域:
催化化学
·
能源化学
·
电化学
·
材料科学
·
氢储能
·
分子催化
✓ 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）