ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiaoxue Zhu,Kai Yang,Zhen Zhang,Siyuan He,Zihao Shen,Wei Jiang,Yiling Huang,Yan Xu,Qiutong Jiang,Limei Pan,Qian Li,Jian Yang
MXenes, represented by Ti3C2Tx, have been widely studied in the electrochemical energy storage fields, including lithium-ion batteries, for their unique two-dimensional structure, tunable surface chemistry, and excellent electrical conductivity. Recently, Nb2CTx, as a new type of MXene, has attracted more and more attention due to its high theoretical specific capacity of 542 mAh g–1. However, the preparation of few-layer Nb2CTx nanosheets with high-quality remains a challenge, which limits their research and application. In this work, high-quality few-layer Nb2CTx nanosheets with a large lateral size and a high conductivity of up to 500 S cm–1 were prepared by a simple HCl-LiF hydrothermal etching method, which is 2 orders of magnitude higher than that of previously reported Nb2CTx. Furthermore, from its aqueous ink, the viscosity-tunable organic few-layer Nb2CTx ink was prepared by HCl-induced flocculation and N-methyl-2-pyrrolidone treatment. When using the organic few-layer Nb2CTx ink as an additive-free anode of lithium-ion batteries, it showed excellent cycling performance with a reversible specific capacity of 524.0 mAh g–1 after 500 cycles at 0.5 A g–1 and 444.0 mAh g–1 after 5000 cycles at 1 A g–1. For rate performance, a specific capacity of 159.8 mAh g–1 was obtained at a high current density of 5 A g–1, and an excellent capacity retention rate of about 95.65% was achieved when the current density returned to 0.5 A g–1. This work presents a simple and scalable process for the preparation of high-quality Nb2CTx and its aqueous/organic ink, which demonstrates important application potential as electrodes for electrochemical energy storage devices.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ELECTROCHIMICA ACTA
·
2011
·
IF 3.65
Qin Hao,Houyi Ma,Zhicheng Ju,Guangda Li,Xiaowei Li,Liqiang Xu,Yitai Qian
LiCoO 2 nanoparticles were prepared through a sol–gel method, and then appropriate amount of CuO nanoparticles were deposited onto their surfaces to improve their cycling performances. It is found that the CuO coated sample has the capacity retention higher than 90% at the rates below 30 C after 10 cycles, which also has the highest capacities of 135 and 123 mAh g −1 at 40 C (5480 mA g −1 ) and 50 C (6850 mA g −1 ), respectively. The cyclic voltammograms result reveals that the CuO coating reduces the polarization and improves the electrochemical activity of cathode. In addition, experimental results indicate that CuO coating plays an important role in reducing the charge transfer resistance of the cell during cycling, which has been demonstrated by the electrochemistry impedance spectroscopy analysis. The above data indicate the potential application of CuO coated LiCoO 2 in high power field.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Materials Express
·
2019
·Vol. 9
·期 8
·895-905
·
IF 1.465
Yu Juan,Huang Wenlong,Meng Bicheng,Wang Lejie,Zhao Junkai,Li Linbo,Du Xiaoqing,Fang Zhao
Sodium ions have been successfully doped into LiNi0.8Co0.1Mn0.1O2 (NCM811) by solid phase method. The influences of Na doping on the electrochemical properties of the electrode at high current intensities were studied. The experimental results
show that 3% Na modified LiNi0.8Co0.1Mn0.1O2 has superior rate performance and cycling behavior due to the cation mixing is suppressed and the structural stability is enhanced by Na doping. The capacity retention of Li0.97Na0.03Ni0.8Co0.1Mn0.1O2
is 64.33% after 100th cycles at 10 C (1 C = 200 mA · g–1) in the potential range from 2.8 V to 4.3 V, which is greatly higher than the pristine NCM (only 35.01%). Li0.97Na0.03Ni0.8Co0.1Mn0.1O2 also shows
excellent rate performance of 140.5 mAh · g–1 at 10 C, and the discharge capacity of 3% Na-NCM is higher than that of the pristine NCM when the current intensity is returned from 10 C to 0.5 C. The analysis of the cyclic voltammetry (CV) and electrochemical impedance
spectroscopy (EIS) measurements confirm that the Na doping plays an important role in inhibiting the electrochemical polarization of LiNi0.8Co0.1Mn0.1O2 and improving the diffusion of lithium ions.
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 Chemistry
·
2023
·
IF 7.3
J.P. Mwizerwa,K. Xu,C. Liu,N. Zhao,Y. Li,P. Ndagijimana,Z. Chen,J. Shen
Currently, the development of high-performance lithium-ion batteries (LIBs) with improved areal capacity is still challenging. The common strategy to improve areal capacity is to increase the thickness of electrode materials. However, the application of thick electrodes remains challenge due to poor mechanical properties , slow charge and ion transport, and poor electrolyte infiltration . In this study, thick electrodes are constructed by 3D printing a Li 4 Ti 5 O 12 @VSe 2 -based ink. The highly electrical conductor VSe 2 on the Li 4 Ti 5 O 12 surface improves the ion and charge transport and eases the internal resistance of the 3D-printed electrode during charge and discharge. As a result, LIBs employing these thick electrodes show a high-rate capability of 128.9 mAh/g at 10 C, improved areal capacities up to 6.2 mAh/cm 2 , and ultrastable cycling capability (84.5% of capacity retention after 1700 cycles). Moreover, full cells utilizing 3D-Li 4 Ti 5 O 12 @VSe 2 as the anode and 3D-LiFePO 4 @AC/rGO as the cathode with 1.81 V potential yield a high specific capacity of 152.5 mAh/g at 0.1C, a high specific energy density of 276.025 Wh/kg, and a power density of 30.5 W/kg at 0.1C. This work paves the way to designing thick electrodes for high-performance LIBs.
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
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xing Li,Jun Xu,Pengxiao Huang,Wei Yang,Zhiqiang Wang,Mingshan Wang,Yun Huang,Ying Zhou,Meizhen Qu,Zuolong Yu,Yuanhua Lin
The in-situ carbon coated LTO composite (LTO/C-PR) is synthesized via a wet chemical method from the phenolic resin coated TiO 2 (TiO 2 /PR) and Li 2 CO 3 . The results indicate that the coated carbon layer pyrolyzing from phenolic resin exhibits higher degree of graphitization than that of pyrolyzing from glucose. The LTO/C-PR composite shows better rate capability and cyclic performance than the LTO/C-G composite using glucose as pyrolytic carbon source. Furthermore, it is found that the higher graphitization of carbon layer can more efficiently suppress the interfacial reactions between the LTO and the electrolyte at the cut-off voltages of 1–3 V. Moreover, the higher graphitization of carbon layer is also favorable to impede the deeper reduction decomposition of the electrolyte below 1.0 V by forming a more successive and thinner SEI film on the LTO electrode. These results indicate that coating the LTO with higher graphitization of carbon layer should be more preferable to solve both the rate capability and the gas generation behavior of the LTO anode material.
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 FUNCTIONAL MATERIALS
·
2023
·
IF 19
Zishuai Zhang,Wei Ling,Ninggui Ma,Jiaqi Wang,Xiaoyang Chen,Jun Fan,Miao Yu,Yan Huang
High rate tolerance and long cycle life represent the critical demand of the market for energy storage devices, known as one of major challenges for the development of rechargeable aqueous batteries. Herein, a layered Mo4/3B2T2 (where “T” denotes -O, -OH, and -F terminations) MBene (a transition metal boride) with in-plane ordered metal vacancies is first proposed as an iodine species host of an aqueous Zn‖I 2 battery, delivering a discharge capacity of 106.8 mAh g −1 at 25 A g −1 after 230 000 cycles and 80 mAh g −1 at 100 A g −1 , far exceeding those of all Zn‖I 2 batteries ever reported. The high performance is attributed to the strong affinity with iodine species and accelerated the redox kinetics by the conductive MBene with metal vacancies, as evidenced by the one-step conversion of I ‒ /I 0 without the generation of I 3‒ ions. This work unlocks a new route for the construction of other halide or sulfur electrode batteries with superior durability and kinetics.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2022
·
IF 5.532
Zhixin Ye,Feifei Zhong,Yunfei Chen,Zhimin Zou,Chunhai Jiang
Composite anode materials with a unique architecture of carbon nanotubes (CNTs)-chained spinel lithium titanate (Li 4 Ti 5 O 12 , LTO) nanoparticles are prepared for lithium ion capacitors (LICs). The CNTs networks derived from commercial conductive slurry not only bring out a steric hindrance effect to restrict the growth of Li 4 Ti 5 O 12 particles but greatly enhance the electronic conductivity of the CNTs/LTO composites, both have contributed to the excellent rate capability and cycle stability. The capacity retention at 30 C (1 C = 175 mA g −1 ) is as high as 89.7% of that at 0.2 C with a CNTs content of 11 wt%. Meanwhile, there is not any capacity degradation after 500 cycles at 5 C. The LIC assembled with activated carbon (AC) cathode and such a CNTs/LTO composite anode displays excellent energy storage properties, including a high energy density of 35 Wh kg −1 at 7434 W kg −1 , and a high capacity retention of 87.8% after 2200 cycles at 1 A g −1 . These electrochemical performances outperform the reported data achieved on other LTO anode-based LICs. Considering the facile and scalable preparation process proposed herein, the CNTs/LTO composites can be very potential anode materials for hybrid capacitors towards high power-energy outputs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
ENERGY & FUELS
·
2022
·
IF 4.654
Zishuai Zhang,Funian Mo,Wei Ling,Mangwei Cui,Jun Wei,Miao Yu,Yan Huang
Aqueous nickel-ion batteries (NiIBs) featuring small ionic radius and high theoretical volumetric capacity hold great potential in novel aqueous battery systems. However, the further development of aqueous NiIBs is plagued, owing to the strong electrostatic repulsion between Ni2+ ions and the host electrode materials, leading to the limited capacity, poor cycling performance, and inferior rate capability. Herein, the novel K2V6O16·1.64H2O (KVO) nanobelts are synthesized and utilized as cathodes for aqueous NiIBs. The KVO cathode delivers a highly reversible specific capacity of ∼140.0 mA h g–1 after the initial activation process, and ∼70.8 mA h g–1 is achieved with the Coulombic efficiency close to 100% at 0.2 A g–1 after 1000 cycles. ∼40.5 mA h g–1 is still achieved at 1.0 A g–1 after 8000 cycles. Moreover, this battery possesses a remarkable rate capability with ∼137.4 mA h g–1 being regained when the current density is switched from 1.8 to 0.2 A g–1, which is ∼97% of that at 0.2 A g–1. The capacity, lifetime, and rate capability achieved all far exceed those of the reported aqueous NiIBs, arising from the layered structure and fast kinetics of the KVO cathode. This work paves the way toward the design of aqueous NiIBs with high electrochemical performances.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
VACUUM
·
2024
·
IF 3.8
Zuhong Ji,Yunfei Sun,Xiaodong Guan,Yang Zhou,Junchao Qian,Feng Chen
In this work, the La substitution of iron and replacing the oxygen with fluorine are both adopted to expectantly enhance the rate performance and structure stability of LiFePO 4 during working. The characterizations of X-ray diffraction, scanning electron microscope , transmission electron microscope, charging-discharging tests, electrochemical impedance spectroscopy and safety tests are used to investigate the influences of La 3+ and F − doping on the LiFePO 4 . The results indicate the cathodes after La 3+ doping not only deliver the larger lattice parameters and unit cell volume to broaden the lithium ions migration pathway and accelerate the Li + diffusion speed, but also strengthen the whole bond energy of LiFePO 4 owing to the high bond energy of La–O. In addition, the F replacement of O could increase the length of Li–O bonds and decrease the length of P–O bonds, further be helpful to enhance the Li + diffusion between LiFePO 4 phase and FePO 4 phase due to the weakening of Li–O bonds. Finally, the La 3+ and F − co-doped cathode delivers the superior discharge capacity of 139.3 mAh g −1 at 5C high rate and 127.2 mAh g −1 at −20 °C, with the high discharging capacity of 160.1 mAh g −1 after 100 cycles at 45 °C.
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 COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Zunbin Duan,Xiaoxiao Feng,Gengchang Lai,Danni Liu,Xiaoyi Zhang,Haoyu Wang,Shuen Chen,Xingchen He,Zihui Liu,Liping Tong,Huaiyu Wang,Xue-Feng Yu,Jiahong Wang
Phosphorus anode has shown great potential for the high-rate and high-energy–density lithium-ion batteries. Nevertheless, it still suffers from possible electrode cracking, ion-transport restrictions, and active-particle decomposition resulting from repeated alloying/de-alloying. To address the aforementioned issues, a nitrogen-doped flower-like porous phosphorus (f-P) sphere has been developed. The abundant micro-mesopores facilitate ion diffusion and enhance the internal bonding strength of the electrode. Concurrently, the doped nitrogen promotes the generation of a favorable solid electrolyte interphase constructed by fast-ion-conductors. As a result, the f-P exhibits a high-rate capacity of 735mAh g −1 at 20 A g −1 and maintains high Coulombic efficiencies over 900 cycles at 10 A g −1 . Furthermore, coin full-cells comprising the f-P anode and lithium cobalt oxide cathode demonstrate stable operation at a high current density of 6 mA cm −2 . The combination of a porous structure and doping strategy represents a viable approach for strengthening the durability of electrodes and optimizing the ion transport kinetics of advanced alloy anode materials.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2020
·
IF 7.489
Tianyu Zhu,Cuiping Yu,Yang Li,Rui Cai,Jiewu Cui,Hongmei Zheng,Dong Chen,Yong Zhang,Yucheng Wu,Yan Wang
Li 2 O-2B 2 O 3 (LBO) ionic conductor with high conductivity plays an important role in boosting the rate performance and cycling stability of Li 4 Ti 5 O 12 (LTO) anode for lithium-ion batteries by preventing direct exposure of LTO to the electrolyte. Herein, the effect of LBO coating layer on lithium ion (Li + ) storage performance is investigated in detail by adjusting the adding amount of LBO precursor dispersion. LTO coated with 2 wt% LBO achieves an optimum performance with a specific capacity of 172.9 mA h g −1 at a current density of 0.1 A g −1 , an improved rate capability (specific capacity of 127.9 mA h g −1 is maintained when the current density is 20 times than 0.1 A g −1 ) and a remarkable cycling stability (capacity retention of 94.2% after 4000 cycles at 2.0 A g −1 ). These LBO-LTO composites are competitive and promising candidates for electrochemical energy storage and other applications.
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
ChemElectroChem
·
2020
·Vol. 7
·期 9
·2184-2189
·
IF 4.154
Shijie Zhou,Jia Li,Licai Fu,Jiajun Zhu,Wulin Yang,Deyi Li,Lingping Zhou
Graphical A joint effort : Black phosphorus is supported on porous carbon in a bonded form through a simple solvothermal reactions. The resulting composites are far superior to pure carbon in terms of rate and cycle performance in Li-ion batteries. Its economic applicability is also higher than that of phosphorus-based materials. Black phosphorus (BP) has received wide attention due to its high theoretical capacity (2596 mAh g −1 ) and good electron mobility, but its cyclic stability is poor. Meanwhile, it can be complementary to carbon material, which has low theoretical capacity but good cycle stability. In this work, we use solvothermal reaction to modify hard carbon materials with black phosphorous (BP). When used as anode material for lithium-ion batteries, the composite will show a higher specific capacity, cyclic stability and rate performance. It shows a high reversible capacity of 350 mAh g −1 after 1000 cycles at 1000 mA g −1 current density. But for pure carbon, it only shows a general reversible capacity of 180 mAh g −1 . Here, the lower content of black phosphorous and the use of hard carbon materials make the material more economically advantageous. And it can be used as an ideal material for cycling at high currents in the future.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）