JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Jinghao Huo,Yujia Xue,Xiaofei Wang,Yi Liu,Lifeng Zhang,Shouwu Guo
Hybrid Li-ion capacitors (LICs) are a new kind of electrochemical energy storage device with high energy and power densities. In this work, phosphorus-doped TiO 2 /phosphorus-doped carbon nanofibers (PTO/PC NFs) are fabricated through a simple electrospinning method with disodium hydrogen phosphate as a phosphorus source. Differing from the PTO prepared by hydrothermal method , sol-gel method or calcining treatment at phosphorous atmosphere. The P-doping evenly distributed in PTO/PC NFs and PTO nanoparticles are embedded in PC, which improves the conductivity, structure stability and Li + ions diffusion of TiO 2 . As a result, the PTO/PC NFs anode shows high capacities of 329 and 150 mA h g −1 (0.1 and 2 A g −1 ), long cycle life (201 mA h g −1 after 1000 cycles at 1 A g −1 , 69 mA h g −1 after 1000 cycles at 5 A g −1 ), and superior pseudocapacitance (87%, 2 mV s −1 ). Furthermore, the LICs assembled with PTO/PC NFs anode and AC cathode show outstanding capacity of 35 F g −1 at a current density of 0.1 A g −1 , high energy density of 72 Wh kg −1 at the power density of 250 W kg −1 , and cycle stability (54%, 10 000 cycles, 1 A g −1 ). This suggests that PTO/PC NFs is a potential anode material for high-performance LICs.
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 CHEMISTRY AND PHYSICS
·
2024
·
IF 4.3
Mingxuan Zong,Yanjiang Zhang,Jianquan Liang,Xinghai Li,Qi Qi,Kangyi Chen,Li Zhao,Changsong Dai
The recently discovered Na 3 MnTi(PO 4 ) 3 cathode material has an extremely high theoretical capacity, but its poor cycling performance makes it challenging to apply. In this work, a series of NASICON-type Na 3+x MnV x Ti 1-x (PO 4 ) 3 /C (x = 0, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8, 1) cathode materials were prepared by sol-gel method for sodium-ion batteries. X-ray diffraction (XRD) indicates that vanadium doping has increased the cell spacing within the material and the cell volume. From the results of X-ray photoelectron spectroscopy (XPS) and Energy dispersive X-ray spectroscopy (EDS) mapping images, it is shown that vanadium has been successfully doped into the material. Among them, the Na 3·3 MnV 0·3 Ti 0·7 (PO 4 ) 3 /C delivers an outstanding specific capacity (121.7 mAh g −1 at 0.1C, C = 135 mA g −1 ) and Na 3·4 MnV 0·4 Ti 0·6 (PO 4 ) 3 /C shows an excellent capacity retention (80.88 % after 1500 cycles at 1C). Notably, the coulombic efficiency of both materials during cycling is close to 100 %, indicating that these materials have great practical application value.
研究领域:
材料科学
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电化学
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能源存储
·
无机固体化学
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电池技术
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Mingzhu Zhu,Binhao Yu,Wenfang Cui,Yongmei Sun,Mei Ma
Carbon coating is a beneficial method for improving surface capacitive behavior, electron transfer kinetics and cyclic stability of three-dimensional lattice lithium-embedded anode materials. Herein, we adopt one-step pyrolysis to achieve carbon-covered TiP 2 O 7 supported by a three-dimensional carbon skeleton utilizing phytic acid and glucose as carbon sources. The two-dimensional amorphous carbon layer on TiP 2 O 7 surface improves the initial Coulombic efficiency and rate capacity by inhibiting the irreversible embedding of lithium ions and reducing the interfacial charge transfer impedance. The three-dimensional carbon skeleton not only forms a conductive pathway between the carbon-covered TiP 2 O 7 , but also its large specific surface area, randomly oriented and defective carbon layer provide extra lithium storage sites and capacitive contribution. In addition, the specific capacity of the TiP 2 O 7 /C composite is still as high as 314.5 mA h g −1 after 1000 cycles at 1 A g −1 . A TiP 2 O 7 /C//LiFePO 4 full cell delivers a high energy density of 273.96 Wh kg −1 at 0.153 kW kg −1 , and retains 114.43 Wh kg −1 even at the power density of 4.086 kW kg −1 . The multi-dimensional carbon modification strategy has improved the electrochemical performance of TiP 2 O 7 -based anode materials, providing a model for synthesizing other high-performance anode materials.
研究领域:
材料科学
·
能源化学
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电化学
✓ 已验证
DOI
高影响因子
MATERIALS & DESIGN
·
2015
·
IF 3.501
Xuan Zhang,Yingqi Chen,Huili Lei,Sheng Zhao,Fei Han,Xia Xiang,Yuancong Zhao,Nan Huang,Guojiang Wan
Titanium dioxide film has received a great deal of attention, because of its excellent potentials and implications, in a variety of fields. Practically, the film is required to be well mechanically blended with the substrate (e.g. good compliance or flexibility) together with its surface properties to accomplish multiple functions. In this work, phytic acid (PA) layer template-assisted deposition of thin TiO 2 film was implemented on titanium substrate to produce a good combination of surface properties and bending strength . Relatively smooth, homogenous and thin (ca. 800 nm) anatase TiO 2 films were obtained on the PA pre-templated Ti substrate. Significantly enhanced photoluminescence was observed on the PA template-deposited TiO 2 as compared to the direct deposited TiO 2 . This is correlated with its higher carrier density in the space charge layer as disclosed by the Mott–Schottky investigation. Likewise, the prepared TiO 2 films are super-hydrophilic (with water contact angle less than 5°), which is credited to the higher polar contribution of surface energy. Moreover, the PA template-deposited TiO 2 film withstood plastic deformation up to 180° angle bending without failure. This template-assisted deposition of TiO 2 film via surface-immobilized organic layer on rigid substrate suggests a promising route to enhance both its mechanical and physical performances.
研究领域:
材料科学
·
表面工程
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 32
·15762-15770
·
IF 9.931
Xi Cao,Lulu Wang,Jitao Chen,Junrong Zheng
A Mg2+/Na+ hybrid aqueous battery with high energy density and low cost is constructed using commercial Mn3O4 as a cathode and NaTi2(PO4)3 as an anode for the first time. During electrochemical cycling, spinel Mn3O4 experiences a transition to layered MnO2 hosting Mg2+/Na+ with a high specific capacity and a long cycling life in Mg2+/Na+ hybrid electrolytes. The battery delivers a discharge potential above 1.2 V and an energy density over 47 W h kg−1 (based on the total mass of electrode materials) at a power density of 48 W kg−1; even at a high power density of 400 W kg−1, it delivers an energy density of 23.6 W h kg−1. What is more, the battery shows an excellent cycling performance with 94% capacity retention after 6000 cycles at 10C. The performances drop only very slightly for batteries prepared by an economic and scalable method. The excellent electrochemical properties, combined with the low cost of raw materials and the ease of scaling up which many aqueous batteries lack, make this approach a very promising cost-effective environment-friendly solution for large-scale energy storage.
研究领域:
材料科学
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电化学
·
储能技术
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2018
·
IF 3.779
Zhi Zhou,Simin Gu,Yongli Zhang,Fangfang Wu,Nan Zhou
NASICON-type NaTi 2 (PO 4 ) 3 has been acknowledged as a promising anode for energy storage due to high ion conductivity and low cost. Nevertheless, intrinsic low electrical conductivity of NaTi 2 (PO 4 ) 3 and low stability in aqueous electrolyte limit its further applications in aqueous lithium rechargeable battery. In this paper, polyaniline as carbon and nitrogen sources was employed to synthesize nitrogen-doped carbon coated NaTi 2 (PO 4 ) 3 (NTP-P) composite by sol-gel approach and following calcination treatment. The loose and carbon-coated structure endows NTP-P with good structure stability and improved electrochemical kinetics . Compared with glucose-derived carbon-coated NaTi 2 (PO 4 ) 3 composite, NTP-P exhibits superior rate and cycling performance. NTP-P with proper carbon content delivers the discharge capacity of 119.4 and 83.4 mAh g −1 at rate of 0.2 and 15 C, and its capacity retention can maintain 85.8% after 1000 cycles at 5 C. This research reveals that the integration of carbon coating and nitrogen doping by using polyaniline give an excellent method to enhance the electrochemical properties of electrode materials.
研究领域:
材料科学
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电化学
·
能源存储
·
无机非金属材料
·
功能材料
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2023
·
IF 5.5
Sun Lixia,Hu Jiayan,Bai Weiqi,Mao Wutao,Song Zhongcheng
The hunt for a higher power storage, relatively inexpensive, non-polluting battery technology is currently a pressing issue because of the rapid growth of the worldwide economic and the progressively significant environmental pollution. Among the possible nanomaterials for rechargeable batteries that can have heteroatoms applied to it in order to improve its electrochemical behavior is LixTiy(PO4)3. Carbon-coated Mn-doped Li2Mn0.1Ti1.9(PO4)3 materials was synthesized by spray drying method. The material was characterized by XRD, SEM, TEM, BET, TGA et al. Crystal data refinement results by Rietveld method showed that the symmetry space group is Pbcn.The lattice parameters of Li2Mn0.1Ti1.9(PO4)3 are a = 11.9372 Å, b = 8.5409 Å, c = 8.5979 Å, α = β = γ = 90°, V = 876.59 Å3 and Z = 4). Rietveld refinement was performed, and the confidence factors are Rwp = 11.79%, Rp = 9.14%, and χ2 = 1.425. It was exhibited that LMTP0.1/CA-700 material has good crystallinity. Testing the cells with LAND test procedure (200 mA/g current density for 200 cycles), the LMTP0.1/CA-700 material has a discharge specific capacity of about 65 mAh/g. The capacity decayed by only 3% during the cycle. It has some potential application values as cathode of lithium ion battery in the future.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
IONICS
·
2016
·Vol. 23
·期 3
·575-583
·
IF 2.119
He Zhangxing,Jiang Yifan,Sun Dan,Dai Lei,Wang Haiyan
Inferior rate capability is a big challenge for LiTi 2 (PO 4 ) 3 anode for aqueous lithium-ion batteries. Herein, to address such issue, we synthesized a high-performance LiTi 2 (PO 4 ) 3 /carbon/carbon nanotube (LTP/C/CNT) composite by virtue of high-quality carbon coating and incorporation of good conductive network. The as-prepared LTP/C/CNT composite exhibits excellent rate performance with discharge capacity of 80.1 and 59.1 mAh g −1 at 10 C and 20 C (based on the mass of anode, 1 C = 150 mA g −1 ), much larger than that of the LTP/C composite (53.4 mAh g −1 at 10 C, and 31.7 mAh g −1 at 20 C). LTP/C/CNT also demonstrates outstanding cycling stability with capacity retention of 83.3 % after 1000 cycles at 5 C, superior to LTP/C without incorporation of CNTs (60.1 %). As verified, the excellent electrochemical performance of the LTP/C/CNT composite is attributed to the enhanced electrical conductivity, rapid charge transfer, and Li-ion diffusion because of the incorporation of CNTs.
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
CERAMICS INTERNATIONAL
·
2017
·Vol. 43
·期 12
·9327-9333
·
IF 2.986
Nan Zhou,Shengxiong Huang,Tao Hong,Wei Luo,Yun Tian,Xiangyang Lu,Zhi Zhou
In this paper, LiTi 2 (PO 4 ) 3 @carbon composite as anode for aqueous lithium ion battery has been successfully synthesized by in-situ carbon coating method using oxalic acid and glucose as double carbon sources. XRD results confirm the rhombohedral NASICON-type LiTi 2 (PO 4 ) 3 structure of the as-prepared composite. The LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources (LTP-OG-10) disperses well, and the coated carbon layer has the appropriate thickness of 3–7 nm, which result in proper balance of the good electrical conductivity and the fast kinetics of diffusion of lithium ions . LTP-OG-10 exhibits better electrochemical performance compared with those using oxalic acid (LTP-O) or glucose (LTP-G) single carbon source. LTP-OG-10 anode delivers the discharge capacity of 112.5 mA h g −1 , 96.8 mA h g −1 , and 54.2 mA h g −1 at 0.2 C, 5 C and 20 C, respectively, much larger than that of LTP-O and LTP-G. Moreover, LTP-OG-10 demonstrated excellent cycling performance, with the capacity retention of 71.1% after 400 cycles at 0.2 C, 22.9% higher than that of LTP-G. The good electrochemical properties of LTP-OG-10 is mainly ascribed to the increase of defects, high-quality and appropriate thickness of carbon layer. Our study reveals that preparing LiTi 2 (PO 4 ) 3 @carbon composite using double carbon sources is an efficient approach to enhance its electrochemical properties.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机非金属材料
·
功能材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2015
·
IF 6.217
Zhantao Liu,Xusong Qin,Hui Xu,Guohua Chen
In this study, a one-pot sintering process incorporating sol–gel preparation route and in-situ carbon coating was proposed for the synthesis of carbon-coated nanosized LiTi 2 (PO 4 ) 3 . Experimental results show that the prepared LiTi 2 (PO 4 ) 3 particles are of high crystallinity and well-coated by turbostratic carbon. Attributed to nanosized particles and enhanced conductivity provided by turbostratic carbon coating, the carbon-coated LiTi 2 (PO 4 ) 3 showed high rate performance and good cycling life in aqueous electrolyte. Particularly, the carbon-coated LiTi 2 (PO 4 ) 3 exhibited initial specific capacities of 103 and 89 mAh g −1 , and retained 80.6% and 97% of the initial capacities after 120 cycles at 1C and 10C in aqueous electrolyte, respectively. The high rate performance and good cycling life of carbon-coated LiTi 2 (PO 4 ) 3 in aqueous electrolyte reveal its potential as negative electrode in aqueous lithium-ion batteries for electric vehicles and industrial-scale energy storage systems .
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米技术
·
无机化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Na Liu,Zhangxing He,Xubo Zhang,Yingqiao Jiang,Yuehua Li,Jing Zhu,Wei Meng,Lei Dai,Ling Wang
In this paper, Li 1−x Na x Ti 2 (PO 4 ) 3 @carbon (x=0.01, 0.03, and 0.05) composites as anode for aqueous lithium ion batteries were synthesized by in situ coating approach. The doping of Na on Li sites did not break the lattice structure of LiTi 2 (PO 4 ) 3 , while the lattice volume was increased by doping of Na. Among Na-doped LiTi 2 (PO 4 ) 3 @carbon composites, Li 0.97 Na 0.03 Ti 2 (PO 4 ) 3 @carbon (LC-Na-3) demonstrated the best electrochemical properties . Compared with the pristine LiTi 2 (PO 4 ) 3 @carbon (LC) composite, LC-Na-3 composite exhibited better rate and cycling performance. LC-Na-3 composite delivered the discharge capacity of 98.5 mAh g −1 at 0.2 C and 45.0 mAh g −1 at 15 C, 10.9 mAh g −1 and 32.1 mAh g −1 larger than that of LC composite, respectively. Moreover, the discharge capacity retention for LC-Na-3 composite achieved 90.4%, 6.9% higher than that for LC composite at the rate of 2 C after 300 cycles. The improved electrochemical properties of Na-doped LiTi 2 (PO 4 ) 3 @carbon composite was ascribed to the decrease of charge transfer resistance and the acceleration of diffusion of lithium ions , resulting from the widening of diffusion channel for lithium ions, which was verified by XRD measurements.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
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）