Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 19
·9350-9357
·
IF 8.867
Jingjing Zhou,Jun Yang,Zhixin Xu,Tao Zhang,Zhenying Chen,Jiulin Wang
Rechargeable lithium–selenium (Li–Se) batteries are promising electrochemical systems with higher energy density than traditional Li ion batteries. Nevertheless, the dissolution of high-order lithium selenides and the shuttle effect in electrolytes lead to low Se utilization, inferior capacity and poor cycling performance. This study proposes a combination of nanostructured Se cathode materials and compatible carbonate electrolytes for promoting the performance of Li–Se batteries. Se/MC composite nanoparticles (∼35 nm) with a moderate Se content (≈51.4 wt%) were prepared by embedding Se into a metal–organic framework derived microporous carbon. The resulting Se/MC cathode exhibits significantly high rate capability and cycling stability in LiDFOB/EC-DMC-FEC electrolyte. It delivers a capacity of 511 mA h gSe−1 after 1000 cycles at 5C, with an inappreciable capacity decay of 0.012% per cycle. Even at a very high rate of 20C, a large capacity of 569 mA h gSe−1 can be obtained, corresponding to a decrease of only 5.6% compared to that at 0.5C. The impressive high rate performance is attributed to the co-effect of selenium confined in ultra-small microporous carbon particles and excellent compatibility of the electrolyte with both the Li anode and selenium composite cathode.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
LANGMUIR
·
2024
·
IF 3.7
Yue Leng,Shengde Dong,Zhan Chen,Yanxia Sun,Qi Xu,Luxiang Ma,Xin He,Chunxi Hai,Yuan Zhou
In this study, we addressed the poor cycling and rate performance of LiNiO2, a material with ultrahigh nickel content considered a strong contender for high-energy-density lithium-ion battery cathodes. We introduced nano-Al2O3 during the lithiation process to achieve dual modified material through bulk phase element doping and in situ LiAlO2 coating. Comparison revealed notable improvements in the modified materials. In particular, LiNi0.99Al0.01O2 maintained a capacity retention rate of 73.1% after 300 cycles in a long-cycle test at 0.5C current density, outperforming the undoped material. In rate performance tests, the doped samples consistently exhibited higher discharge-specific capacities than that of the undoped counterpart. Notably, at a high current density of 5C, LiNi0.99Al0.01O2 exhibited a discharge-specific capacity of 101.75 mAh g–1. The results indicate that an appropriate amount of Al doping can effectively stabilize the layered structure of the cathode material and delay the irreversible phase transition from H2 to H3. Further, Al doping facilitates the formation of a LiAlO2 coating on the surface of the particles. This coating acts as a fast-ion conductor, enhancing the transport of lithium ions and reducing the erosion of the active material by the electrolyte.
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
ACS Applied Nano Materials
·
2025
·
IF 5.5
Chengzhi Wei,Wenrui Wu,Yang Yang,Yue Yan,Hao Zhang,Xianfu Li
In this study, MoSe2 and NiFe-LDHs were synthesized on a self-supported conductive nickel foam (NF) substrate via a one-step method. Specifically, MoSe2 was grown on the nickel foam via a one-step solvothermal method to form the MoSe2/NF precursor material. Subsequently, NiFe-LDHs were deposited on the MoSe2/NF substrate through a one-step hydrothermal method, resulting in the formation of the NiFe-LDHs/MoSe2/NF composite material. We found that although both NiFe-LDHs and MoSe2 monomers have certain disadvantages, such as a tendency to agglomerate and relatively poor electrical conductivity, their combination yields an interesting “two negatives make a positive” effect. The NiFe-LDHs/MoSe2/NF composite exhibits a high specific capacitance of 6790 mF cm–2 at a current density of 2 mA cm–2, which is significantly higher than that of NiFe-LDHs (1317.6 mF cm–2) and MoSe2 (1475.2 mF cm–2). Additionally, the composite demonstrates excellent cycling stability, with a capacitance retention of 99.87% after 4000 cycles. In contrast, NiFe-LDHs/NF retains only 54.01% of its capacitance after 2000 cycles, and MoSe2/NF retains only 48.15% after the same number of cycles. The asymmetric supercapacitors (ASCs) assembled from the NiFe-LDHs/MoSe2/NF composite and activated carbon (AC) show remarkable performance. These devices have a high potential window of 0–1.55 V and achieve an extremely high energy density of 0.5558 mWh cm–2 at a power density of 1.55 mW cm–2. Moreover, they exhibit an ultrahigh capacitance retention of 99.1% after 10,000 cycles, indicating excellent cycling stability. The Coulombic efficiency of the capacitor remains at a high value of approximately 99.8% throughout the cycling process. NiFe-LDHs/MoSe2/NF and similar materials can be designed for flexible supercapacitors integrated into clothing or skin patches to power sensors. In the context of medical device designs requiring energy storage components to rapidly release substantial energy, they may also play a critical role.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Technologies
·
2025
·
IF 6.2
Haoming Xu,Wenli Li,Imtiaz Haider,Yuhua Zheng,Mianqi Xue,Jiechao Ge,Bao Wang,Serge Zhuiykov,Yanbin Cui
Structural design and interlayer architecture of electrochromic (EC) materials play significant role in their performance. Herein, tungsten trioxide (WO 3 ) nanoflowers have been synthesized through in situ intercalation with polyaniline (PANI), developing a 3D hierarchical structure with optimized interlayered spacing. The PANI-WO 3 composite showed superior EC stability due to improved ion storage capacity by 3D hierarchical structure with extended surface area for ion interaction. The enlarged layer spacing of PANI-WO 3 composites allows for accommodating more exchangeable Li + . The PANI-WO 3 film maintains remarkable cycling stability, retaining 80% of its initial capacity after 30000 cycles. The EC device based on PANI-WO 3 demonstrates high optical modulation (57% at 633 nm), rapid switching speeds (coloration to 23% in 15 s and bleaching to 80% in 10 s) and high coloration efficiency (168 cm 2 C −1 ). Meanwhile, the PANI-WO 3 EC supercapacitor achieves a high specific capacitance (121 mF cm −2 at 0.2 mA cm −2 ) and prolonged cyclic life (specific capacity remains at 58% and coulombic efficiency at 65% after 1500 cycles). The PANI-WO 3 serves as an effective candidate for the fabrication of high-performance EC devices (ECDs) with potential applications in energy-saving smart windows, outdoor static displays, and other energy-efficient technologies.
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
ACS Applied Materials & Interfaces
·
2016
·
IF 7.145
Shuojian Su,Yanna NuLi,Zhenguo Huang,Qi Miao,Jun Yang,Jiulin Wang
Mg2+/Li+ hybrid batteries have recently been constructed combining a Mg anode, a Li+-intercalation electrode, and an electrolyte containing both Mg2+ and Li+. These batteries have been reported to outperform all the previously reported magnesium batteries in terms of specific capacity, cycling stability, and rate capability. Herein, we report the outstanding electrochemical performance of Mg2+/Li+ hybrid batteries consisting of a one-dimensional mesoporous TiO2(B) cathode, a Mg anode, and an electrolyte consisting of 0.5 mol L–1 Mg(BH4)2 + 1.5 mol L–1 LiBH4 in tetraglyme. A highly synergetic interaction between Li+ and Mg2+ ions toward the pseudo-capacitive reaction is proposed. The hybrid batteries show superior rate performance with 130 mAh g–1 at 1 C and 115 mAh g–1 at 2 C, together with excellent cyclability up to 6000 cycles.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 24
·13458-13464
·
IF 3.049
Hao Guo,Mingyue Wang,Rui Xue,Jing Yao,Xuejiao Wang,Longwen Zhang,Jianfeng Liu,Wu Yang
A new COF (NWNU-COF-4) linked by an aryl ether bond (Ar–O–Ar) was synthesized by the condensation reaction of 2,4,6-trihydroxypyrimidine and trinitrophenol under simple and easy reaction conditions. Fourier transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), N2 adsorption–desorption, thermogravimetric analysis (TGA), powder X-ray diffraction (XRD) and scanning electron microscopy (SEM) were utilized to characterize the product. The BET specific surface area of NWNU-COF-4 was 21.33 m2 g−1, and its pore size was about 1.351 nm. Additionally, this method of preparation was simple and cheap. The electrochemical measurements showed that the synthesized NWNU-COF-4 had excellent pseudocapacitive performance with maximum specific capacitance of 133.44 F g−1 at 0.3 A g−1 in 6 mol L−1 KOH electrolyte. When the current density increased by 10 times (3.0 A g−1), the specific capacitance was 114.12 F g−1, and the retention rate was 82%. After 10 000 GCD cycles, the capacitance still kept 94% of its initial capacitance.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2019
·
IF 4.175
Zhihao Wang,Yihui Liu,Yuqian Chen,Lan Yang,Yun Wang,Mingrui Wei
As anionic insertion pseudopotential electrode, perovskite oxides have attracted more and more attention due to their high electrical conductivity and oxygen vacancy concentration. In this study, double perovskite PrBaCo 2 O 5+δ (PBCO) oxide was synthesized by simple sol-gel method. Phase composition, porous structure and surface chemistry were analyzed by X-ray diffraction (XRD), scanning electron microscope (SEM) and X-ray photoelectron spectroscopy (XPS). Cyclic voltammetry (CV) and galvanostatic charge-discharge (GCD) curves were used to explore the electrochemical performance. The tests show that the PBCO electrodes exhibit good capacitance performance with the high specific capacity value of 428.2 C g −1 at 1 mV s −1 . Furthermore, the capacitance retention still achieves 93% after 2000 cycles, showing excellent cycling stability. This paper analyzes the capacitance behavior of PBCO electrodes, and demonstrates the insertion mechanism that oxygen vacancies are filled by oxygen ions. All these prove that PrBaCo 2 O 5+δ has potential applications in supercapacitors .
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 MATERIALS SCIENCE
·
2019
·Vol. 55
·期 7
·2913-2922
·
IF 3.442
Zhong Zeqin,Chen Lingzhen,Huang Shaozhen,Shang Weili,Kong Lingyong,Sun Ming,Chen Lei,Ren Wangbao
Single-crystalline LiNi 0.5 Co 0.2 Mn 0.3 O 2 (denoted as SC-523) with micron size had been successfully synthesized through a facile method. Electrochemical impedance spectroscopy and differential scanning calorimetry were carried out to identify the improved electrochemical performance and desired thermal stability. Even after 100 cycles, SC-523 still delivered a discharge capacity of 151.1 mA h g −1 (capacity retention with 90.3%) at 1 C in voltage range from 3.0 to 4.5 V (vs. Li/Li + ), while polycrystalline spherical LiNi 0.5 Co 0.2 Mn 0.3 O 2 (denoted as PC-523) only exhibited 141.7 mA h g −1 (capacity retention with 78.4%). Besides, SC-523 shows a higher decomposition temperature of 332.13 °C, 14.61 °C higher than that of PC-523 during the thermal decomposition. Consequently, single-crystalline particles with robust morphological integrity ensure the enhanced cycling stability and thermal stability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energies
·
2024
·Vol. 17
·期 9
·2180
·
IF 3
Xicheng Wang,Wentao Xia,Wenlong Xu,Zengqiao Chen,Xiaohan Ren,Yuandong Yang
Thermochemical energy storage (TCES) is one of the key technologies facilitating the integration of renewable energy sources and mitigating the climate crisis. Recently, Li4SiO4has been reported to be a promising heat carrier material for TCES applications, owing to its moderate operation temperature and stability. During the synthetic processes, the properties of the Si source used directly influence the performance of derived Li4SiO4materials; however, the internal relations and effects are not yet clear. Hence, in this work, six kinds of SiO2sources with different phases, morphology, particle size, and surface area were selected to synthesize a Li4SiO4-based TCES heat carrier. The physicochemical properties of the SiO2and the corresponding derived Li4SiO4were characterized, and the comprehensive performance (e.g., heat storage/releasing capacity, rate, and cyclic stability) of the Li4SiO4samples was systematically tested. It was found that the silica microspheres (SPs), which possess an amorphous phase, uniform micro-scale structure, and small particle size, could generate Li4SiO4TCES materials with a highest initial capacity of 777.7 kJ/kg at 720 °C/900 °C under pure CO2. As a result, the SP-L showed an excellent cumulative heat storage amount of 5.84 MJ/kg within 10 heat-releasing/storage cycles, which was nearly 1.5 times greater than the value of Li4SiO4derived from commonly used silicon dioxide. Furthermore, the effects of the utilized Si source on the performance of as-prepared Li4SiO4and corresponding mechanisms were discussed, which offers guidance for the future selection of Si sources to produce high-performance Li4SiO4-based TCES heat carriers.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
ENERGY & FUELS
·
2023
·
IF 5.3
Peng Wang,Yihong Ding,Ying Chu,Xinxin Zhu,Jie Lin,Lixiong Shao,Tianbiao Zeng
FeSb2S4 is considered a potential anode material of sodium-ion batteries (SIBs) due to the high theoretical capacity (877 mAh g–1) and fast Na+ diffusion kinetics. Synthesis of the FeSb2S4-based anode via a simple strategy is essential for practical applications. In this study, nano FeSb2S4 anchored on exfoliated graphite (FeSb2S4-G) was fabricated via a two-step strategy: heat treatment of commercial FeS+Sb2S3 powder and then ball-milling with commercial graphite. X-ray photoelectron spectroscopy (XPS) and density functional theory (DFT) calculations reveal that the pulverized nano FeSb2S4 and exfoliated graphite establish the chemical bonds, which is very advantageous to boost the charge/discharge reversibility. As-prepared FeSb2S4-G delivered 577 mAh g–1 in the second cycle under 100 mA g–1 and kept 385 mAh g–1 in the 70th cycle; the cycling stability surpassed bulk FeSb2S4 (662 mAh g–1 in the 2nd cycle, 109 mAh g–1 in the 70th cycle). Considering only two steps of the synthesis processes, this work presents a viable strategy for fabricating high-performance FeSb2S4-based SIB anode materials.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2020
·Vol. 8
·期 5
·2000008
·
IF 3.404
Chengrui Wang,Lei Zhang,Yuhai Dou,Luke Hencz,Lixue Jiang,Mohammad Al-Mamun,Porun Liu,Shanqing Zhang,Dan Wang,Huijun Zhao
Further commercial application of low-cost NiO-based anodes is hindered by their large volume expansion after full lithiation and relatively poor theoretical capacity. To improve these issues, transition metal (Fe, Co, or Mn)-modified triple-shelled NiO microspheres (TS-NiO) are successfully synthesized by using a hard template double-adsorption method. Among them, the Fe-modified TS-NiO (TS-NFO) exhibits an extraordinary lithium storage ability with high reversible capacity and outstanding cycling stability (2061.1 mAh g −1 after 800 cycles at 0.5 A g −1 ), which is the highest performing nickel oxide-based anode reported to date. The outstanding electrochemical performance of TS-NFO can be ascribed to its unique triple-shelled structure. The inner core of TS-NFO is composed of NiO and is encapsulated by two outer shells which are composed of a mixture of α-Fe 2 O 3 and NiFe 2 O 4 , resulting in a unique hollow triple-shelled structure (NiO@α-Fe 2 O 3 /NiFe 2 O 4 ). The void space between the triple shells leaves room for their volume changes during lithiation/delithiation, which improves the cycling stability. In addition, the introduced α-Fe 2 O 3 /NiFe 2 O 4 outer shells increase the energy density and reversible capacity due to a synergistically interactive effect.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 5
·2101831
·
IF 6.389
Dekai Wu,Chengzhe Yang,Jie Sun,Peng Zhong,Xiaohua Ma,Yimin Lei
In this paper, Ti 4 O 7 /g-C 3 N 4 nanocomposites are successfully prepared by hydrothermal and carbothermal reduction reaction. It shows large specific surface area and electrochemical active surface area (ECSA = 187.82 cm 2 ) and can act as an oxidation reduction reaction catalyst. Compared with commercial Pt/C catalyst, Ti 4 O 7 /g-C 3 N 4 nanocomposites show good catalytic activity in alkaline medium. The peak potential, onset potential, and half-wave potential are 0.74 (versus RHE), 0.96 (versus RHE), and 0.74 V (versus RHE), respectively. It is worth mentioning that Ti 4 O 7 /g-C 3 N 4 catalyst shows better methanol tolerance and cycle stability than commercial Pt/C catalyst. The relative current density attenuation is less than 30% after a long cycle of 24 h.
研究领域:
材料科学
·
电化学
✓ 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）