ACS Applied Energy Materials
·
2020
·
IF 4.473
Wen Liu,Xifei Li,Youchen Hao,Hirbod Maleki Kheimeh Sari,Jian Qin,Wei Xiao,Xiujuan Wang,Huijuan Yang,Wenbin Li,Liang Kou,Zhanyuan Tian,Le Shao,Cheng Zhang,Jiujun Zhang
LiNi0.8Co0.1Mn0.1O2 (NCM) is a highly prospective cathode material for high energy density Li-ion batteries (LIBs). Nevertheless, poor cycling performance and rate capability at high cutoff voltages have dramatically blocked its further commercialization. In this study, an ionic conductive interface has been demonstrated to enhance the NCM electrochemical property at the high cutoff voltage of 4.5 V on account of the existence of a Li-ion conductor of Li2SnO3. In comparison to SnO2, Li2SnO3 causes a smoother Li-ion diffusion at the engineered interfaces, lower polarization, slower capacity drop, and voltage fading as well as better H2/H3 reversibility upon cycling. Importantly, it is confirmed that excellent diffusion is beneficial to preservation of reversible phase transition and reduction of polarization, which are directly relative to the superior cyclability and rate capability. This work reveals that building an excellent ionic diffusion interface is feasible for Ni-rich cathodes with simultaneous high capacity and stable cyclability.
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 Energy Storage
·
2025
·
IF 9.8
Yue Yu,Yujiao Guo,Ping Ning,Haibibu Aziguli
The spinel LiMn 2 O 4 is considered a promising cathode option material because it provides three-dimensional pathways for Li-ion diffusion. However, LiMn 2 O 4 exhibits insufficient rate capabilities and rapid structural deterioration during prolonged cycling, particularly under conditions of high current or elevated temperatures. Herein, we introduce a Mg 2+ /Al 3+ co-doping strategy to evade these problems. As a result, the co-doping of Mg 2+ and Al 3+ facilitates the development of a polyhedral morphology, enhancing both structural stability and rapid Li-ion diffusion. Furthermore, the incorporation of Mg 2+ and Al 3+ , which have a stable electronic configuration, enhances structural stability through their relatively stronger Mg O and Al O bonds compared to the Mn O bond. Therefore, the LiMg 0.02 Al 0.08 Mn 1.90 O 4 delivers the first discharge capacity of 107.6 mAh‧g −1 at 1 C. Importantly, the LiMg 0.02 Al 0.08 Mn 1.90 O 4 cathode achieves long cycling lifespans exceeding 1000 cycles at high current rates of 20 C. A capacity retention of 70.0 % is retained at 20 C after 1000 cycles, as well as a high-temperature capacity retention of 47.4 % after 500 cycles at 5 C and 55 °C. Moreover, the Mg 2+ /Al 3+ co-doping facilitates the kinetic process of Li + migration, leading to a relatively high Li + diffusion coefficient and a low apparent activation energy.
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 Energy Chemistry
·
2018
·
IF 3.886
Aikai Yang,Xingchao Wang,Yong Lu,Licheng Miao,Wei Xie,Jun Chen
Organic carbonyl compounds are considered as promising candidates for lithium batteries due to their high capacity and environmental friendliness. However, they suffer from serious dissolution in the electrolyte, leading to fast capacity decay. Here we report core-shell structured 1,4-benzoquinone@titanium dioxide (BQ@TiO 2 ) composite as cathode for lithium batteries. The composite cathode can deliver a high discharge capacity of 441.2 mA h/g at 50 mA/g and a high capacity retention of 80.7% after 100 cycles. The good cycling performance of BQ@TiO 2 composite can be attributed to the suppressed dissolution of BQ, which results from the physical confinement effect of TiO 2 shell and the strong interactions between BQ and TiO 2 . Moreover, the combination of ex situ infrared spectra and density functional theory calculations reveals that the active redox sites of BQ are carbonyl groups. This work provides an alternative way to mitigate the dissolution of small carbonyl compounds and thus enhance their cycling 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
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Chun-xian Zhou,Peng-bo Wang,Bao Zhang,Lin-bo Tang,Hui Tong,Zhen-jiang He,Jun-chao Zheng
Li-rich cathode materials are regarded as ideal cathode materials, owing to their excellent electrochemical capacity. However, residual lithium compounds, which are formed on the surface of the materials by reacting with moisture and carbon dioxide in ambient atmosphere, can impair the surface structure, injure the capacity, and impede the electrode fabrication using Li-rich materials. Exposure to air atmosphere causes the formation of residual lithium compounds; the formation of such compounds is believed to be related to humidity, temperature, and time during handling and storage. In this study, we demonstrated for the first time an artificial strategy for controlling time, temperature, and humidity to accelerate exposure. The formation and effect of residual lithium compounds on Li-rich cathode material Li1.35[Ni0.35Mn0.65]O2 were systematically investigated. The residual lithium compounds formed possessed primarily an amorphous structure and were partially coated on the surface. These compounds include LiOH, Li2O, and Li2CO3. Li2CO3 is the major component in residual lithium compounds. The presence of residual lithium compounds on the material surface led to a high discharge capacity loss and large discharge voltage fading. Understanding the formation and suppressing the effect of residual lithium compounds will help prevent their unfavorable effects and improve the electrochemical performance.
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
ELECTROCHIMICA ACTA
·
2017
·
IF 4.798
Guangfeng Zhang,Zhixiao Xu,Ping Liu,Yuezeng Su,Tao Huang,Ruili Liu,Xin Xi,Dongqing Wu
In this work, a facial in-situ polymerization strategy is developed for the first time to fabricate the composites of polyimide and carbon black (PI/CBs) by the condensation of 1,2,4,5-benzenetetracarboxylic anhydride and p -phenylenediamine with the presence of carbon black. This composition method can effectively suppress the crystallization of PI and thus allows the sufficient contact of PI and carbon black. As the cathode material in LIBs , the PI/CB composite manifests an extraordinary capacity of 182 mAh g −1 at 0.1 A g −1 , close to the theoretical value of PI. Moreover, the capacity of the PI/CB composite can be retained as 116 m Ah g −1 even at an ultrahigh current density of 10 A g −1 , outperforming the recently reported polymer LIB cathodes. Under the same conditions, the mechanical mixture of highly crystallized PI sheets and carbon black shows a much poorer performance. The approach demonstrated herein is expected to be further applied as an effective processing method to build up high performance electrodes with organic species in secondary batteries.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Energy Technology
·
2022
·Vol. 10
·期 5
·2101140
·
IF 4.149
Chaoxu Ye,Xin Zhang,Ying Wang,Meng Qin,Yanjun Shi,Zhidong Chen,Wenchang Wang,Jianyu Cao,Juan Xu
Anthraquinone and its derivatives show compelling electrochemical activities in lithium-ion batteries due to their abundant redox-active carbonyl groups and desirable π -conjugated structures. However, anthraquinone-based compounds often suffer from inferior material utilization, a low-capacity retention rate, and short cycle life due to poor conductivities and unexpected dissolution properties in supporting electrolytes during the charge/discharge cycles. To solve these problems, a novel grafted polymer, poly(N-anthraquinoyl pyrrole) (e-PAQPy), containing redox-active anthraquinone subunits and conductive polypyrrole groups, is prepared by an electrochemical polymerization method and employed as the cathode material for organic lithium-ion batteries. Polypyrrole backbone chain in e-PAQPy is utilized both to bring into high electronic conductivity and to decrease the solubility of the anthraquinone subunits. As expected, the e-PAQPy exhibits a high specific capacity (196.2 mAh g −1 at 0.1 C), good rate performance (70.8 mAh g −1 at 3 C), and long cycle stability (79% of the initial capacity after 500 cycles).
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Hanwu Luo,Haipeng Shi,Yang Cao,Yuting Yin,Yi-Hu Feng,Xin-Yu Fan,Peng-Fei Wang,Xiaogang Han
Delivery of a high operating voltage with stable cycling behavior is a challenge in developing cathodes for high-energy Li-ion batteries (LIBs). The representative spinel LiNi0.5Mn1.5O4 materials own a high discharge voltage of 4.7 V (versus Li+/Li) and a large theoretical specific capacity of 147 mA h g–1. However, they usually suffer from undesired transition metal dissolution and intensive cathode–electrolyte interfacial side reactions during high-voltage cycling, incurring unacceptable capacity decay and short cycle life. To solve these problems, we present a radially aligned hierarchical structure with different chemical compositions from the bulk (LiNi0.4Cr0.1Mn1.5O4) to the surface (LiNi0.5Mn1.5O4) of the structure. The introduction of Cr3+ to the inner end suppresses the Jahn–Teller active Mn3+ and partial Mn2+ dissolution, thus improving the bulk stability. The construction of the undoped shell avoids and eliminates the catalytic effect of the dopant on interfacial side reactions, thus enhancing the interfacial stability. As a consequence, the designed LNMO@iCr–LNMO (6 wt % coating) compound achieves capacity retentions of 95.2% at 1C after 500 cycles and 93.6% at 2C after 1000 cycles. This work highlights the significance of bulk and interface chemistry in high-energy cathode materials for LIBs.
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
·
2021
·Vol. 14
·期 18
·5380
·
IF 3.623
Haichang Zhang,Zhibin Xu,Bin Shi,Fei Ding,Xingjiang Liu,Hongzhao Wu,Chunsheng Shi,Naiqin Zhao
Cr8O21can be used as the cathode material in all-solid-state batteries with high energy density due to its high reversible specific capacity and high potential plateau. However, the strong oxidation of Cr8O21leads to poor compatibility with polymer-based solid electrolytes. Herein, to improve the cycle performance of the battery, Al2O3atomic layer deposition (ALD) coating is applied on Cr8O21cathodes to modify the interface between the electrode and the electrolyte. X-ray photoelectron spectroscopy, scanning electron microscope, transmission electron microscope, and Fourier transform infrared spectroscopy, etc., are used to estimate the morphology of the ALD coating and the interface reaction mechanism. The electrochemical properties of the Cr8O21cathodes are investigated. The results show that the uniform and dense Al2O3layer not only prevents the polyethylene oxide from oxidization but also enhances the lithium-ion transport. The 12-ALD-cycle-coated electrode with approximately 4 nm Al2O3layer displays the optimal cycling performance, which delivers a high capacity of 260 mAh g−1for the 125th cycle at 0.1C with a discharge-specific energy of 630 Wh kg−1.Keywords:Cr8O21cathode material;atomic layer deposition;all-solid-state lithium-ion batteries;Al2O3coating
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 Nano
·
2023
·
IF 17.1
Chunxian Xing,Haoran Da,Peng Yang,Jiawei Huang,Min Gan,Jian Zhou,Yong Li,Haitao Zhang,Binghui Ge,Linfeng Fei
The huge amount of degraded NCM (LiNi0.5Co0.2Mn0.3O2) cathode materials from spent lithium-ion batteries is arising as a serious environmental issue as well as a severe waste of metal resources, and therefore, direct recycling of them toward usable electrode materials again is environmentally and economically more attractive in contrast to present metallurgical treatments. In this work, we design a robust two-step method for direct recycling of degraded NCM materials, which uses the aluminum impurity from the attached current collector to supplement the transition metal vacancies for simultaneous elemental compensation and structural restoration. This single-element compensation strategy leads to the regeneration of high-quality NCM material with depressed cation disordering and stabilized layered structure. Moreover, the regenerated NCM material with controllable Al doping delivered an outstanding electrochemical performance; specifically, the capacity (158.6 mAh g–1), rate capability (91.6 mAh g–1 at 5 C), and cycling stability (89.6% capacity retention after 200 cycles) of the regenerated NCM material are even comparable with those of fresh materials. The as-established regeneration protocol has its chance in simplifying the industrial recycling process of degraded NCM materials.
研究领域:
材料科学
·
环境科学
·
能源科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2023
·Vol. 106
·期 10
·6074-6084
·
IF 3.9
Yunjie Gou,Guangdong Li,Wang Sun,Jinshuo Qiao,Kening Sun,Zhenhua Wang
LiCoO 2 (LCO) has been widely adopted as the electrode for lithium-ion batteries (LIBs) which provide a solution for settling problems referring to energy and environment. The demand for rapid and controllable synthesis of LCO increases dramatically. In this work, reactive flash sintering (RFS), for the first time, was introduced to synthesize LCO rapidly and controllably based on simple oxide precursors. The as-prepared LCO, investigated by physicochemical property characterization, showed well-constructed and high crystallinity and controllable morphologies, in which the grain size varied with the magnitude of the applied limited current value, allowing for grain size modulation. Furthermore, the as-prepared LCO exhibited excellent performance in cyclic stability and rate capacity by contrast with that synthesized by the conventional solid-phase sintering method. This is admittedly attributed to better crystallinity and less lithium loss. Therefore, RFS provides a new approach for the manufacture of LCO electrode and has the potential to be applied to other electrode materials for 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
International Journal of Electrochemical Science
·
2023
·
IF 1.5
Kai Xia,Rui Liang,Yi Luo,Anqiao Zheng,Guodong Jiang,Mingxia Fan,Jian Xiong,Songdong Yuan
A series of LiFe 0.7 Mn 0.3−x Mg x PO 4 /C (x = 0, 0.02, 0.05, and 0.08) cathode materials were synthesized by a high-temperature solid-phase method and characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy, and electrochemical tests to determine the structural, morphological, and electrochemical properties of the synthesized materials. The experimental results showed that the small amount of Mg 2+ doping not only had no effect on the crystalline structure of the material but also significantly improved the electrochemical properties of the material. The LiFe 0.7 Mn 0.25 Mg 0.05 PO 4 /C material achieved specific discharge capacities of 163.2, 155.2, 149.1, and 142.0 mAh/g at 0.1C, 0.2C, 0.5C, and 1C, respectively, and a capacity retention rate of 98.6% after 50 cycles at 0.1C. It exhibited excellent rate performances and cycling stability. Electrochemical alternating-current impedance showed that the lithium-ion diffusion coefficient of the LiFe 0.7 Mn 0.25 Mg 0.05 PO 4 /C sample reached 1.19 × 10 −13 cm 2 /s, which was 4.1 times higher than that of the pre-modified sample. Combined with the cyclic voltammetry test results, it was found that the appropriate amount of Mg 2+ doping could reduce the impedance and polarization of the material as well as increase the conductivity and the lithium-ion diffusion rate, ultimately improving the electrochemical properties.
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
·
2022
·
IF 9.794
Mingwei Jiang,Lingbo Ren,Zhidong Hou,Wei Hua,Da Lei,Yunjing Cao,Yu Zhang,Jian-Gan Wang
Sodium-ion batteries are receiving incremental attention as a promising alternative of the commercial lithium-ion batteries. However, it remains a challenging task to fully explore suitable cathode and anode materials for assembling a full cell with attractive Na-ion storage properties. Herein, we demonstrate a superior sodium-ion battery by pairing a tubular Prussian blue (PB) cathode and its derived phosphide anode. The tubular configuration endows the PB with fast reaction kinetics and thus delivers a large specific capacity of 94.4 mAh g −1 even at a high rate of 5.0 A g −1 . The PB-derived phosphide is featured by encapsulation of FeP nanoparticles into a conductive carbon matrix, which enables remarkable sodium energy storage likewise. Impressively, the as-assembled sodium-ion full cell exhibits an unprecedented capacity of 105.3 mAh g −1 at 2.0 A g −1 and good cycling lifespan. The present study offers a homologous design strategy based on PB and its derivatives for constructing outstanding sodium-ion full cells.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）