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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DOI
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
Small
·
2023
·Vol. 19
·期 27
·2300519
·
IF 13.3
Lizhen Long,Yaya Ding,Nina Liang,Jun Liu,Fuchi Liu,Sheng Huang,Yuezhong Meng
Li–CO 2 battery provides a new strategy to simultaneously solve the problems of energy storage and greenhouse effect. However, the severe polarization of CO 2 reduction and CO 2 evolution reaction impede the practical application. Herein, anodic TiO 2 nanotube arrays are first introduced as carbon-free and free-standing cathode for photo-assisted Li–CO 2 battery, and the photo-assisted charge and discharge mechanism is first clarified from the perspective of photocatalysis. Mixed-phase TiO 2 exhibits a long cycling life of 580 h (52 cycles) at 0.025 mA cm −2 and delivers a high discharge specific capacity of 3001 µAh cm −2 under UV illumination. The charge voltage dramatically reduces from 4.53 to 3.03 V under UV illumination. The improvement of photo-assisted Li–CO 2 battery performance relies on the synergistic effect of the hierarchical porous structure, strong UV absorption, efficient separation, and transfer of photo-generated electrons and holes at hetero-phase junction, and the facilitation of photo-generated electrons and holes on CO 2 reduction and CO 2 evolution reaction. This work can provide useful guidance for designing efficient photocathode for photo-assisted Li–CO 2 battery and other metal–air batteries.
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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
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
Advanced Materials Interfaces
·
2022
·Vol. 9
·期 32
·2201259
·
IF 6.389
Wenjing Hou,Yuting Ma,Jin Kang,Yaoming Xiao,Gaoyi Han
Lithium bis(trifluoromethanesulfonyl)imide (Li-TFSI) doped 2,2′,7,7′ -tetrakis( N , N -di-p-methoxyphenylamine)-9,9′-spirobifluorene (Spiro-OMeTAD) is employed as one of the most common hole transport layer. However, the Li + in Li-TFSI is easy to migrate from Spiro-OMeTAD to perovskite and SnO 2 , left the voids/pinholes in perovskite film to accelerate the invasion of oxygen and moisture, and lead to the device degradation. Here, the 1-butyl-3-methyl imidazolium phosphate dibutyl ester ([Bmim] + [DBP] − ) ionic liquid (IL) is prepared and used to modify the perovskite/Spiro-OMeTAD interface in the perovskite solar cells. The coordination interaction between P O in [Bmim] + [DBP] − IL and Pb 2+ can improve the morphology of perovskite film by passivating the uncoordinated Pb 2+ defects. The interaction between P O and Li + can suppress the undesired Li + migration. The regulated energy level assignment and ion nature of [Bmim] + [DBP] − IL can accelerate the carrier extraction at perovskite/Spiro-OMeTAD interface. The device based on the [Bmim] + [DBP] − IL interface modification yields a highly efficient photoelectric conversion efficiency of 21.16% and improved stability, outperforming that of control (19.31%) devices under the illumination of 100 mW cm −2 (AM 1.5 G).
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2023
·
IF 9.9
Sen Jiang,Xin Xu,Junying Yin,Yue Lei,Hongtao Guan,Yunfang Gao
Lithium (Li) metal batteries (LMBs), paired with high-energy–density cathode materials , are promising to meet the ever-increasing demand for electric energy storage. Unfortunately, the inferior electrode–electrolyte interfaces and hydrogen fluoride (HF) corrosion in the state-of-art carbonate-based electrolytes lead to dendritic Li growth and unsatisfactory cyclability of LMBs. Herein, a multifunctional electrolyte additive triallylamine (TAA) is proposed to circumvent those issues. The TAA molecule exhibits strong nucleophilicity and contains three unsaturated carbon–carbon double bonds , the former for HF elimination, the later for in-situ passivation of aggressive electrodes. As evidenced theoretically and experimentally, the preferential oxidation and reduction of carbon–carbon double bonds enable the successful regulation of components and morphologies of electrode interfaces, as well as the binding affinity to HF effectively blocks HF corrosion. In particular, the TAA-derived electrode interfaces are packed with abundant lithium-containing inorganics and oligomers , which diminishes undesired parasitic reactions of electrolyte and detrimental degradation of electrode materials . When using the TAA-containing electrolyte, the cell configuration with Li anode and nickel-rich layered oxide cathode and symmetrical Li cell deliver remarkably enhanced electrochemical performance with regard to the additive-free cell. The TAA additive shows great potential in advancing the development of carbonate-based electrolytes in LMBs.
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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
Journal of Energy Chemistry
·
2020
·
IF 7.216
Jing Jie,Yulong Liu,Lina Cong,Bohao Zhang,Wei Lu,Xinming Zhang,Jun Liu,Haiming Xie,Liqun Sun
Poly(vinylidenefluoride-co-hexafluoropropylene) (PVDF-HFP) based gel polymer electrolytes are widely studied owing to their electrochemical stability and high dielectric constant. However, most gel polymer electrolytes show unsatisfied safety and interface compatibility due to excessive absorption of volatile and flammable liquid solvents. Herein, by using a safe solvent (N-methyl-2-pyrrolidone) with higher boiling (203 °C) and flash points (95 °C), we initiatively fabricate a flexible PVDF-HFP based gel polymer electrolyte . The obtained gel polymer electrolyte demonstrates a high ionic conductivity of 7.24 × 10 −4 S cm −1 , an electrochemical window of 5.2 V, and a high lithium transference number of 0.57. As a result, the synthesized polymer electrolyte exhibits a capacity retention of 70% after 500 cycles at 0.5 C, and a discharge capacity of 86 mAh g −1 even at a high current rate of 10 C for LiFePO 4 based Li metal batteries. Moreover, a stable Li plating/stripping for more than 500 h is achieved under 0.1 mAh at both room temperature and 70 °C. Our results indicate that the PVDF-HFP polymer electrolyte is promising for manufacturing safe and high-performance Li metal polymer batteries.
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高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Chuankai Fu,Yulin Ma,Pengjian Zuo,Wei Zhao,Weichao Tang,Geping Yin,Jiajun Wang,Yunzhi Gao
Solid-state electrolytes with high room temperature ionic conductivity , broad electrochemical window, and favorable thermal stability are crucial for the practical application of all-solid-state lithium-metal batteries. Here, a novel succinonitrile (SN)-based composite solid-state electrolyte (SN-CSSE) is fabricated directly inside the glass-fiber (GF) membrane via in-situ thermal-crosslinking ethoxylate trimethylolpropane triacrylate (ETPTA) monomer , coupled with the liquid SN-based electrolyte. The ionic conductivity, oxidation potential and lithium-ion transference number (T Li + ) of SN-CSSE are 0.78 mS/cm, 5.20 V (vs. Li/Li + ) and 0.68 at ambient temperature, respectively. The coin full cells equipped with high-voltage LiCoO 2 (LCO) and modified Li metal anode deliver excellent interfacial stability, cycling reversibility , and rate capability. Moreover, the LCO/SN-CSSE/Li pouch cell exhibits more superior thermal stability than that of cell with commercial carbonate-based electrolyte during thermal shock test.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Jun Qi,Jiaqing Zhang,Jiangwen Liu,Liuzhang Ouyang,Hui Wang,Lichun Yang,Renzong Hu
To enhance the rate capability and cyclic stability, we develop few layered graphene wrapped nanocrystalline/amorphous Sn 4 P 3 (named as Sn 4 P 3 @FLG) by ball milling. The high energy output of vibrational ball milling enables tight contact of Sn 4 P 3 with FLG via P O C bonding as well as compact structure with a high tap density of 4.5 g cm −3 . The constraint of FLG not only enhances kinetics of electron and Li + transfer, but also relieves the volume variation and particle aggregation of Sn 4 P 3 during the lithiation/delithiation process. Therefore, Sn 4 P 3 @FLG exhibits superior rate and cyclic performance when evaluated as anode material for lithium-ion batteries. At 0.1 A g −1 , it delivers a high reversible capacity of 1077.6 mA h g −1 with a high coulombic efficiency of 89.0% in the first cycle. Even at 1 A g −1 , it still retains 929.6 mA h g −1 after 830 cycles. Furthermore, when matched with commercial LiFePO 4 cathode in a full cell, it delivers a reversible capacity of 778.0 mA h g −1 , with a coulombic efficiency of 79.4%. Considering the high tap density of 4.5 g cm −3 , the volumetric capacity of Sn 4 P 3 @FLG can be as high as 3500 A h dm −3 . Therefore, Sn 4 P 3 @FLG can be a promising anode material for high performance lithium-ion batteries.
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高影响因子
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