JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2024
·
IF 9.4
Linna Dai,Xin Zhou,Yuan Yang,Pei Hu,Lijie Ci
Nonaqueous Li − O 2 battery (LOB) is considered one of the most promising energy storage system due to its ultrahigh theoretical specific capacity (3500 Wh kg −1 ). Introducing vacancies in CoMn 2 O 4 catalysts is regarded as an effective strategy to enhance the electrochemical performances of LOB. However, the relation between vacancy types in CoMn 2 O 4 and catalytic performances in the LOB remains ambiguous. Herein, ordered porous CoMn 2 O 4 with oxygen and metal vacancies is obtained via solvothermal reaction followed by temperature-controlled calcination using polystyrene spheres as templates. The increase in treatment temperature reduces the content of oxygen vacancies while increasing that of the metal vacancies. Notably, experimental results and theoretical calculations show that oxygen vacancies in CoMn 2 O 4 have a greater influence than metal vacancies in modulating the LiO 2 adsorption during the reaction processes and reducing the overpotential. CoMn 2 O 4 synthesized at 500 ℃ (CoMnO-500) with higher oxygen vacancies exhibits stronger adsorption onto the LiO 2 , facilitating the formation of film-like Li 2 O 2 . Therefore, an LOB with the CoMnO-500 catalyst presents the lowest overpotential of 1.2 V and longest cycle lifespan of 286 cycles at a current density of 200 mA g −1 . This study offers insights into the effect of CoMn 2 O 4 vacancies on the formation pathway of Li 2 O 2 discharge products.
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高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Sheng-Yi Li,Wen-Peng Wang,Sen Xin,Juan Zhang,Yu-Guo Guo
Lithium metal batteries (LMBs) are regarded as the promising candidate for next-generation energy storage devices. Three-dimensional (3D) current collector is one of the effective anode materials for suppressing lithium (Li) dendrite and accommodating the variation of Li volume during the cycling. However, since the protruding 3D skeleton will also pierce the separator and cause catastrophic battery failure, the safety risk of short circuit still exists. The use of ceramic solid-state electrolyte (SSE) with high mechanical stability on the 3D anode can eliminate the danger of short circuit caused by Li dendrites or 3D skeleton. Nevertheless, in solid-state batteries, 3D anodes with highly electroactive areas suffer from considerable interface reactions and high interface impedance. Herein, we demonstrate a facile in-situ polymerized sealing (IPS) strategy to reconcile the 3D anode with ceramic SSE. The optimized battery configuration consists of 3D anode, in-situ polymerized interlayer and NASICON-type ceramic electrolyte of Li 1.3 Ti 1.7 Al 0.3 (PO 4 ) 3 (LATP). The in-situ polymerized interlayer not only significantly reduces the interfacial resistance between the 3D anode and LATP, but also encapsulates liquid electrolyte within the electrode for indispensable interface reactions and rapid Li + transport. Resultingly, the symmetric cell of 3D Li | LATP | 3D Li delivered a long cycle life of 500 h. Moreover, this unique configuration can be paired with a LiNi 0.6 Co 0.2 Mn 0.2 O 2 cathode and operate at room temperature, which exhibits excellent performances. This work provides a practical strategy for building safe and durable high-energy solid-state LMBs suitable for next-generation energy storage devices.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Ximin Ling,Wutao Wei,Changwei Shan,Xuyan Qin,Mingjie Song,Zhao Liu,Liwei Mi
Mg 2+ /Li + hybrid batteries (MLHBs), which support the rapid insertion and removal of Mg 2+ /Li + bimetallic ions, are promising energy storage systems. Inspired by the Kirkendall effect, ball-in-ball bimetallic sulfides with heterostructures were prepared as cathode materials for the MLHBs. First, a nickel–cobalt precursor (NiCo-X precursor) with three-dimensional (3D) nanosheets on its surface was prepared using a solvothermal method based on the association reaction between alkoxide molecules. Subsequently, the NiCo-X precursor was vulcanized at high temperature using the potential energy difference as the driving force to successfully prepare NiS 2 @CoS 2 core–shell hollow spheres. When used as the positive electrode material for the MLHBs, the NiS 2 @CoS 2 hollow spheres exhibited excellent Mg 2+ /Li + ion storage capacity, high specific capacity, good rate performance, and stable cyclic stability owing to their tough hierarchical structure. At a current density of 500 mA g −1 , a specific capacity of 536 mAh g −1 was maintained after 200 cycles. By explaining the transformation mechanism of Mg 2+ /Li + in bimetallic sulfides, it was proven that Mg 2+ and Li + worked cooperatively. This study provides a new approach for developing MLHBs with good electrochemical properties.
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高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Fanjue Wen,Shuai Cao,Xin Ren,Yuliang Cao,Xinping Ai,Fei Xu
Trimethyl phosphate (TMP) is the most promising safe solvent for lithium-ion battery (LIB) electrolyte because of the nonflammability, oxidation stability, and low cost, but its application is hindered by incompatibility with the graphite anode. Herein, nonflammable electrolytes with ordinary concentration (1 mol L–1) are designed for graphite/LiNi0.8Co0.1Mn0.1O2 (Gr/NCM811) LIBs with TMP/2,2,2-trifluoroethyl methyl carbonate (FEMC) binary solvents. Stable cycling of the Li/Gr half cells with high capacity is achieved via modulation of the Li+ solvation structure. A dual-salt strategy of lithium hexafluorophosphate/lithium difluoro(oxalato)borate is further used to realize the high performance of the Gr/NCM811 full cells. More significantly, the functions and relationship of Li+ solvation structure and electrode/electrolyte interphase are elucidated. Li+ solvation structure and interphase are respectively the thermodynamic and kinetic factors for the side reactions of the electrolyte occurring at the electrode/electrolyte interphase, which should be considered comprehensively in the design of electrolytes for high-energy density LIBs.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Xuyan Qin,Wutao Wei,Ximin Ling,Changwei Shan,Zhao Liu,Mingjie Song,Zhikai Wang,Xi Jia,Liwei Mi
The design of a simple and safe method for constructing heterojunction structures in nanocomposites is a promising strategy for the manufacture of high-performance electrochemical energy storage devices. In this paper, based on the “less-liquid” reaction system and the assistance of the generated NaCl, a heterojunction-containing zero-dimensional (0 D) CoS2/NiS2 nanocomposite with particle sizes ranging from 50 to 200 nm were prepared. During this reaction, the reactant carries crystalline water to provide a liquid environment. Similarly, the lattice occupation of the generated NaCl promotes the construction of a large number of heterogeneous structures inside the nanostructured materials. The prepared material was subsequently employed as a cathode material for the Mg2+/Li+ hybrid battery (MLHB). The interface effect of the heterostructures induces an electric field within the nanocrystals, resulting in a lower ion diffusion resistance, and facilitating interfacial electron transport. Therefore, the heterojunctions accelerated the diffusion dynamics at the interface, and increased the charge-transfer rate. Mg2+ and Li+ exhibit reversible synergistic effects. More specifically, at a current density of 0.2 A g–1, the initial discharge specific capacity was 785.5 mAh g–1, while at a current density of 0.5 A g–1, a discharge specific capacity of 317.54 mAh g–1 was maintained over 200 cycles. And the Coulombic efficiency was maintained at ∼99.8%. This simple and safe design method for nanoscale heterogeneous materials provides a method for developing high-performance MLHB cathode materials.
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高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Ao Li,Can Qian,Guihong Mao,Zhao Liu,Zhixiong Li,Yujia Zhang,Liang Yin,Laifa Shen,Hong Li
Lithium-rich layered oxides (LROs) possess enormous potential in the new generation of high-energy lithium-ion batteries due to their high specific capacity, working voltage, and low cost. However, they still face low initial coulombic efficiency, poor cycling stability and multiplication performance, and persistent voltage decay, which seriously hinder their development in the lithium-ion battery industry. In this article, the Li 1·4 Y 0·4 Ti 1·6 (PO 4 ) 3 ionic conductive layer is constructed on the surface of LROs using surface residuals as lithium sources. Such a one-step modification method not only improves the rate performance of LROs by enhanced kinetic property of Li + , but also elongates the cycling lives at high-temp and high-rates by the inhibition of interfacial side reactions. As a result, the LRO cathode with a high initial coulombic efficiency of 89.3% and a good capacity retention of 83.2% after 200 cycles at 1C is obtained. It is noteworthy that this multifunctional surface modification strategy can stimulate the potential of LROs in lithium-ion batteries and provide a new way to stabilize their structure.
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高影响因子
Small
·
2024
·Vol. 20
·期 23
·2307292
·
IF 13
Yongjian Li,Xinyu Zhu,Yuefeng Su,Lifeng Xu,Lai Chen,Duanyun Cao,Ning Li,Feng Wu
Layered Li-rich oxide cathode materials are capable of offering high energy density due to their cumulative cationic and anionic redox mechanism during (de)lithiation process. However, the structural instability of the layered Li-rich oxide cathode materials, especially in the deeply delitiated state, results in severe capacity and voltage degradation. Considering the minimal isotropic structural evolution of disordered rock salt oxide cathode during cycling, cation-disordered nano-domains have been controllably introduced into layered Li-rich oxides by co-doping of d 0 -TM and alkali ions. Combining electrochemical and synchrotron-based advanced characterizations, the incorporation of the phase-compatible cation-disordered domains can not only hinder the oxygen framework collapse along the c axis of layered Li-rich cathode under high operation voltage but also promote the Mn and anionic activities as well as Li + (de)intercalation kinetics, leading to remarkable improvement in rate capability and mitigation of capacity and voltage decay. With this unique layered/rocksalt intergrown structure, the intergrown cathode yields an ultrahigh capacity of 288.4 mAh g −1 at 0.1 C, and outstanding capacity retention of ≈90.0% with obviously suppressed voltage decay after 100 cycles at 0.5, 1, and 2 C rate. This work provides a new direction toward advanced cathode materials for next-generation Li-ion batteries.
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高影响因子
Inorganic Chemistry Frontiers
·
2024
·Vol. 11
·期 11
·3323-3333
·
IF 6.1
Shunqin Zeng,Meinan Zhao,Chen Xie,Jianhui Li,Xiaoli Ding,Liqing He,Yongtao Li,Qingan Zhang,Hai-Wen Li
Developing composite solid electrolytes (CSEs) represents a promising avenue for advancing commercial viability of all-solid-state batteries because none of the single electrolytes can meet the application requirements. However, the correlation of interfacial reconstruction among more than two composite solid electrolytes with property enhancements still remains unclear. In this study, lithium-based hydride-oxide solid electrolytes are chosen as a model to explore in situ interfacial reactions between these composites, with the goal of innovating design of electrolytes for all-solid-state batteries. Our research reveals the formation of dual core–shell-structured electrolytes with LiBO2 as the intermediate layer and LiBH4 as the outer layer embedded with LixM intermediates, resulting in the in situ reactions of LiBH4 and LixMOy (M = N, P, S) composites. These composites exhibit continuous conductive networks and demonstrate a high Li+ conductivity of ∼1.9 × 10−4 S cm−1 at 75 °C. This impressive conductivity enables stable cycling of Li–Li symmetric cells for 650 h. Moreover, the critical current density can reach about 2.3 mA cm−2, and the electrochemical window extends from −0.5 to 6 V. Notably, the reversible specific capacity attains 225.1 mA h g−1 for Li‖TiS2 batteries with an initial coulombic efficiency of 95.4%. This work provides valuable insights into the design and performance of composite solid electrolytes, offering a promising approach for the development of high-performance all-solid-state batteries.
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高影响因子
RARE METALS
·
2023
·Vol. 43
·期 3
·1153-1166
·
IF 8.8
Lu Li-Wen,Luo Hui,Li Guang-Xu,Li Yun,Wang Xin-Hua,Huang Cun-Ke,Lan Zhi-Qiang,Zhou Wen-Zheng,Guo Jin,Ismail Mohammad,Liu Hai-Zhen
The Li-Mg-B-H composite (2LiBH 4 + MgH 2 ) has a high capacity of 11.4 wt% as a hydrogen storage material. However, the slow kinetics and poor cycling stability severely restrict its practical applications. In this work, a layered Nb 2 C MXene was first synthesized and then introduced to tailor the kinetics and cycling stability of the Li-Mg-B-H composite. The milled 2LiH + MgB 2 composites were initially hydrogenated to obtain the 2LiBH 4 + MgH 2 composites. The 2LiBH 4 + MgH 2 + 5 wt% Nb 2 C can release 9.0 wt% H 2 in 30 min at 400 °C, while it is only 2.7 wt% for the undoped 2LiBH 4 + MgH 2 . The dehydrogenation activation energies of MgH 2 and LiBH 4 are 123 and 154 kJ·mol −1 respectively for the 5 wt% Nb 2 C-doped composite, lower than the undoped composite (164 and 165 kJ·mol −1 ). The 2LiBH 4 + MgH 2 + 5 wt% Nb 2 C possesses excellent cycling stability, with the reversible capacity only slightly reduced from 9.4 wt% for the 1st cycle to 9.3 wt% for the 20th cycle. Nb 2 C keeps stable in the composite and acts as an efficient catalyst for the Li-Mg-B-H composite. It is believed that both the layered structure and the active Nb element contribute to the enhanced hydrogen storage performances of the Li-Mg-B-H composite. This work confirms that the Nb 2 C MXene with layered structure has a significant enhancing impact on the Li-Mg-B-H hydrogen storage materials, which is different from the bulk NbC. Graphical abstract
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
·
IF 4.65
Long Liu,Xinxi Li,Gen He,Guoqing Zhang,Guanji Su,Chenhui Fang
Silicon-based materials have been widely used as anode materials in lithium-ion batteries (LIBs) because of the high specific capacity. However, there exist some shortcomings, especially in the thermal stability of the batteries, as well as huge volume expansion (＞300%) causes structural cracking. Herein, a core-shell structured SiO@C/TiO 2 nanospheres has been successfully synthesized via ball milling and sol-gel method, the morphological, componential and thermal features are characterized with X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy. The results exhibit that the SiO could spontaneously absorb the huge volume expansion stress, the C/TiO 2 shell as a compact fence was utilized to effectively enhance the electrical conductivity and further control the integrity and stability of well-wrapped core-shell framework during the charge/discharge processes. The electrochemical analysis show the SiO@C/TiO 2 nanospheres possess a remarkably high initial coulomb efficiency of 97%. The reversible capacity can reach to 1565 mA h g −1 at 0.1 A g −1 after 100 cycles, which is higher than those of N–SiO (1353 mA h g −1 ) and SiO@C (1326 mA h g −1 ). Even at 2 A g −1 , it exhibit a discharge capacity of 844.6 mA h g −1 after 220 cycles. This excellent performance can be primarily attributable to the well-designed core-shell structure of SiO@C/TiO 2 nanospheres, where the outer rigid C/TiO 2 coating can not only effectively alleviate the large volume change of SiO but also maintain the stable structure of anode materials, which are considered as a promising candidate to the anode material for new generation power LIBs.
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高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Xingguo Zhong,Yaqing Wei,Yanpeng Guo,Can Cui,Tianyou Zhai,Huiqiao Li
Blending two materials together to improve electrode performance has been proven an effective and practical strategy in the battery industry. Herein, we fabricate a novel n-HC/GeP 5 composite that doubles the energy density over hard carbon (HC) without sacrificing cycle stability and rate performance. The GeP 5 , with high capacity (2289 mAh g −1 ), ultra-high conductivity (2.4*10 6 S m −1 ) and high initial coulombic efficiency (ICE > 90%), enables it serve as an effective additive to HC at a low weight percent. By introducing 20% wt GeP 5 by mass ratio into HC, the obtained n-HC/GeP 5 -20%wt composite improves the reversible capacity from 400 mAh g −1 to 898 mAh g −1 , and improves ICE from 74% to 85%. In addition, the rate capability of n-HC/GeP 5 , with 516 mAh g −1 and 64% retention comparing 1C–8C, is much better than that of pure HC (273 mAh g −1 , 54% retention). Consequently, when tested at 1C and 8C for 550 cycles, large reversible capacity of 575 mAh g −1 and 400 mAh g −1 respectively can still be obtained for this n-HC/GeP 5 -20% hybrid, revealing its great potential to be used in commercial battery products.
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高影响因子
CERAMICS INTERNATIONAL
·
2017
·
IF 2.986
Qin Li,Han Zhang,Shuaifeng Lou,Yunteng Qu,Pengjian Zuo,Yulin Ma,Xinqun Cheng,Chunyu Du,Yunzhi Gao,Geping Yin
Metallic oxide ZnO is considered to be a promising alternative anode material for lithium ion battery because of its high theoretical capacities (978 mA h g −1 ). However, its inherent low electronic conductivity and undesirable large volume change result in inferior electrochemical performances and hinder its practical application. Herein, ZnO/ZnO@C composites are prepared by a simple carbonization process of ZnO/ZnO@ZIFs-8, which are constructed by using ZnO particles as both template and zinc sources for zeolitic imidazolate frameworks-8 (ZIF-8) preparation via a facile solution reaction. When evaluated as anode for lithium ion batteries, the as-prepared composites show an initial capacity of 878 mA h g −1 at current density of 0.1 A g −1 with high capacity retention of 95.6% after 50 cycles, and an initial capacity of 359 mA h g −1 tested at 5.0 A g −1 with a capacity retention of 85.3% after 500 cycles, exhibiting outstanding cycling stability and excellent rate capability. The ameliorated electrochemical performances are mainly attributed to the elevated conductivity and cushioning effects provided by carbon framework derived from ZIF-8, and the enhanced pseudocapacitance behavior originated from the decreased size of ZnO particles and high surface area of ZIFs-derived carbon.
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高影响因子
危险品化学品经营许可证（带存储）