SURFACE & COATINGS TECHNOLOGY
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2021
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IF 4.158
Zehua Cai,Rengui Xiao,Bo Jiang
Sodium superionic conductor (NASICON)-type conducting ceramic Li 1+x Al x Ti 2−x (PO 4 ) 3 (LATP) has been regarded as one of the most promising candidates for high-safety and high-energy density solid-state Li metal batteries (SSLMBs) because of its high ionic conductivity and good chemical stability. However, the large interfacial impedance and instability between the solid electrode and LATP electrolyte severely hinder its practical application in solid-state batteries. To overcome this technical challenge, we demonstrate a polymer–ceramic–polymer composite electrolytes (PCPCEs) prepared through drop casting, which ameliorates the interfacial stability between the solid electrolyte and the electrode. PCPCEs with an ideal ambient-temperature ionic conductivity can drastically reduce the interfacial resistance between the LATP and solid electrodes and effectively avoid a direct reaction and contact between them. As a result, the interfacial impedance decreases from 30,000 to 280 Ω for the Li–LATP interfaces and from 40,000 to 800 Ω for the LATP–LiFePO 4 (LFP) interfaces. Meanwhile, the polarization voltage of the Li||PCPCEs||Li symmetric cell reduces from 1.5 V to 100 mV. The solid-state Li metal batteries assembled with a Li metal anode , LFP cathode, and PCPCEs exhibit a desired initial discharge capacity of 152.5 mAh g −1 and a good cycling performance at 0.1 C for 25 °C. This study provides a prospective insight to improve the poor interface between the solid electrode and inorganic conducting ceramic.
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DOI
高影响因子
ACS Applied Materials & Interfaces
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2022
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IF 10.383
He Chen,Xu Xiao,Qizhen Zhu,Peng Zhang,Xiaoxue Wang,Bin Xu
Mn3O4 is regarded as a promising anode material for lithium-ion batteries (LIBs) based on its ultrahigh theoretical capacity (937 mAh g–1) and low cost but suffers from poor electronic conductivity and large volume variation during the lithiation/delithiation process, which result in dramatic capacity fading and inferior rate capability. Ti3C2Tx MXene, a novel two-dimensional transition metal carbide with metallic conductivity, excellent mechanical properties, and hydrophilic surface, could be an ideal candidate to improve the lithium storage performance of Mn3O4. Here, a unique flexible, 2D–2D Mn3O4/MXene film is fabricated by assembling 2D Mn3O4 with Ti3C2Tx nanosheets through a simple vacuum filtration approach. In this unique 2D–2D nanostructure, MXene nanosheets buffer the volume change of Mn3O4 during the charge/discharge process. Moreover, the introduction of MXene enables the fabricated 2D–2D nanostructure with excellent flexibility and can be directly used as an electrode for LIBs, which is beneficial for enhancing the energy density of the assembled batteries. As a result, the flexible film of Mn3O4-MXene-8-2 shows excellent lithium storage performances in terms of specific capacity (931 mAh g–1 at 0.05 A g–1), rate capability (624 mAh g–1 at 1 A g–1), and cycling stability, demonstrating its great potential for the application in LIBs.
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DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
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2021
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IF 13.273
Pingping Chen,Qinghui Zeng,Qingyuan Li,Ruihua Zhao,Zhenfeng Li,Xin Wen,Wen Wen,Yu Liu,Anqi Chen,Zengxi Li,Xiangfeng Liu,Liaoyun Zhang
Solid-state polymer electrolytes (SPEs) have gained considerable attention in the application of all-solid-state lithium batteries (ASSLBs), but the low ionic conductivity at room temperature and inferior interfacial compatibility largely drag the practical development of SPEs. Herein, a ketone-containing poly(allyl acetoacetate) (PAAA) based polymer electrolyte is designed and prepared for the first time. The structure of ester and ketone groups provides PAAA polymers with not only strong dissociation of lithium salts but also weak coordination interactions with Li + ions. Thus the prepared PAAA polymer electrolytes show excellent ion conductive behavior with ionic conductivity as high as 1.1 × 10 -4 S cm −1 at 30 °C. Moreover, the PAAA polymer electrolytes still maintain superior viscoelasticity without compromising mechanical integrity. When assembling cells, the reduction-tolerant poly(ethylene oxide) (PEO) polymer electrolytes are employed as interlayers between the PAAA SPEs and lithium electrodes in order to improve interfacial stability. As a result, the hierarchical polymer electrolytes possess wide electrochemical window above 4.8 V, thus matching well with LiFePO 4 or Li 1.2 Ni 0.2 Mn 0.6 O 2 high-voltage cathode. The hierarchical structure does not affect interfacial contact, and the Li/PEO-PAAA-PEO/Li cells show low interfacial resistance and stable striping/plating behavior for at least 500 h at 0.2 mA cm −2 and 60 °C. This study enriches carbonyl-based polymer electrolytes by allying ketone with ester groups, and provides guidance for designing novel high-performance polymer electrolytes for practical application.
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DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2023
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IF 6.2
Yiyang Mao,Yingying Hu,Jun Shen,Renxin Wang,Huihui Zhang,Ruilin Wang,Pei Zhao,Baofeng Wang
Hybrid Mg 2+ /Li + batteries (MLIBs) are a promising battery system that combines the advantages of fast lithium-ion kinetics and dendrite-free magnesium deposition. Layered molybdenum disulfide (MoS 2 ) has gained increasing interest due to larger layer spacing and weak van der Waals forces in MLIBs. However, poor intrinsic electronic conductivity hinders its practical application. Here, a highly conductive MoS 2 /MoO 2 /reduced graphene oxide (MoS 2 /MoO 2 /rGO) composite synthesized via a facile hydrothermal method is employed as a high-performance cathode material for MLIBs. The high electrical conductivity (7.5 ×10 −3 S cm −1 ) and large specific surface area of MoS 2 /MoO 2 /rGO facilitate the rapid transport of interfacial electrons and provide abundant active sites for Mg 2+ /Li + storage. The optimized MoS 2 /MoO 2 /rGO composite exhibits a high discharge capacity (297.3 mAh g −1 ) and excellent rate performance. Moreover, the composite electrode delivers ultra-long cycle life over 5000 cycles at 1000 mA g −1 , with a capacity degradation rate of only 0.007 % per cycle. The results offer valuable insights for the development of highly conductive MoS 2 -based composites.
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高影响因子
ELECTROCHIMICA ACTA
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2014
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IF 4.086
Xueqin Yuan,Hongxing Xin,Xiaoying Qin,Xiangjun Li,Yongfei Liu,Haifeng Guo
SiO/reduced graphene oxide (SiO/rGO) composite was prepared by a simple hydrothermal process involving the capsulation of SiO particles with graphene hydrogel followed by the HF treatment. The prepared composite electrode exhibited higher discharge capacity and better rate capability than the pristine SiO electrode. Such enchancement could be attributed to the efficient conducting/buffering rGO matrix and the successful corrosion of SiO 2 shell on the surface of SiO.
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高影响因子
Journal of Physical Chemistry C
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2021
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IF 4.126
Kaixuan Cui,Fuqiang An,Wang Zhao,Ping Li,Shengwei Li,Chunrong Liu,Xuanhui Qu
Liquid metal batteries are an emerging and promising large-scale electrochemical energy-storage technology, the corrosion of which is a significant issue due to their high-operating temperature environment and an all-liquid structure. Herein, we have comprehensively investigated the corrosion behavior of SS304 in the Sb–Sn alloy under static conditions and cell-cycling conditions. The corrosion mechanism and the battery reaction process are clarified on the basis of electrochemical measurements and ex situ analyses. Fe and Ni of SS304 are considered to dissolve easily in the liquid Sb–Sn alloy rather than Cr, forming the Fe–Ni–Sb–Sn corrosion products. Due to corrosion, changes in the composition of the positive electrode cause an abnormal discharge voltage plateau and capacity fading. The appearance of low-discharge voltage plateau is mainly dominated by the reaction of Fe–Sb with Li. Sn in the positive electrode promotes the diffusion of dissolved elements and accelerates the corrosion of the current collector. This work concludes that Fe- and Ni-based alloys such as stainless steel are not promising positive current collectors of Li||Sb–Sn liquid metal batteries. It enlightens us to further find a conductive and corrosion-resistant protective coating or optimize the composition of the positive electrode.
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高影响因子
ACS Applied Materials & Interfaces
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2017
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IF 7.504
Jiafeng Ruan,Tao Yuan,Yuepeng Pang,Xinbo Xu,Junhe Yang,Wenbin Hu,Cheng Zhong,Zi-Feng Ma,Xuanxuan Bi,Shiyou Zheng
Red phosphorus (P) is considered to be one of the most attractive anodic materials for lithium-ion batteries (LIBs) due to its high theoretical capacity of 2596 mAh g–1. However, intrinsic characteristics such as the poor electronic conductivity and large volume expansion at lithiation impede the development of red P. Here, we design a new strategy to embed red P particles into a cross-link-structural carbon film (P–C film), in order to improve the electronic conductivity and accommodate the volume expansion. The red P/carbon film is synthesized via vapor phase polymerization (VPP) followed by the pyrolysis process, working as a flexible binder-free anode for LIBs. High cycle stability and good rate capability are achieved by the P–C film anode. With 21% P content in the film, it displays a capacity of 903 mAh g–1 after 640 cycles at a current density of 100 mA g–1 and a capacity of 460 mAh g–1 after 1000 cycles at 2.0 A g–1. Additionally, the Coulombic efficiency reaches almost 100% for each cycle. The superior properties of the P–C films together with their facile fabrication make this material attractive for further flexible and high energy density LIB applications.
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DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
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IF 8.3
Yifei Chen,Qihang Zhang,Kaiming Wang,Mengyuan Shen,Liang Zhang,Yunpeng Li,Jiamin Yuan,AnLi Wang,Fei Shen,Xiaogang Han
Despite being heralded as the “holy grail” of anodes for their high theoretical specific capacity, lithium (Li) metal anodes still face practical challenges due to difficulties in fabricating ultrathin Li with controllable thickness and suppressing Li dendrites growth. Herein, we introduce a simple and cost-effective dip-coating method to fabricate ultrathin lithium–tin (LiSn) anode with adjustable thicknesses ranging from 4.5 to 45 μm. The in situ formation of Li22Sn5 alloy improves the wettability of the molten Li, enabling the casting of ultrathin Li metal layers on different substrates. More importantly, the abundant Li22Sn5 lithiophilic sites significantly lower the nucleation overpotential, inducing uniform Li deposition and accelerating the electrochemical reaction at the interface. As a result, the symmetric cell assembled with LiSn–Cu electrodes can cycle stably for more than 120 h with a charge/discharge depth of 50%, which is 1.5 times longer than the lifespan of the pure Li anode. In the full cells paired with NCM cathode, the discharge specific capacity is improved from 13.84 to 70.31 mA h g–1 with the LiSn–Cu anode at 8 C. The LiSn–Cu||NCM full cell realized a high energy density of 724.9 Wh kg–1 at the active material level with an N/P ratio of 1.4.
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高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
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2020
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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
ACS Applied Materials & Interfaces
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2019
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IF 8.456
Yang Hu,Wu Tang,Qihang Yu,Chuluo Yang,Cong Fan
The lithium-rich organic cathodes are undoubtedly important for fabricating lithium-ion (Li-ion) full batteries. Currently, very few lithium-rich organic cathodes have been reported for their O2-sensitive characteristics. In this article, we initially propose a new electrochemical method to in situ synthesize a novel lithium-rich organic cathode, namely lithium anthracene-9,10-bis[2-benzene-1,4-bis(olate)] (ABB4OLi, CT = 256 mA h g–1), from its phenol precursor of anthracene-9,10-bis(2-benzene-1,4-diol). The addition of anthracene moiety as the linking bridge is to increase the molecular weight and simultaneously enhance the electronic conductivity for the designed organic molecule (ABB4OLi). In Li-ion half cells, ABB4OLi could deliver average specific capacities of 194 mA h g–1 during 250 cycles (50 mA g–1) and 100 mA h g–1 during 400 cycles (2 A g–1). In the all-organic Li-ion full cells with the working voltage above 1 V, the ABB4OLi electrode could realize the average capacities of 70 mA h g–1cathode during 200 cycles (50 mA g–1). This work has forwarded a significant step for the development of organic Li-ion full batteries.
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高影响因子
CHEMICAL ENGINEERING JOURNAL
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2020
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IF 10.652
Yaying Dou,Xin-Gai Wang,Dashuai Wang,Qinming Zhang,Chengyi Wang,Gang Chen,Yingjin Wei,Zhen Zhou
Large overpotential in oxygen reduction and evolution reactions is the intractable obstruction of Li-O 2 batteries, causing inferior round-trip efficiency and diminished cycle life. Modulating the reaction mechanism of Li 2 O 2 is of crucial importance for a high-performance Li-O 2 battery. Herein, we report a composite of amorphous RuO 2 nanoparticles decorated carbon nanotubes (A-RuO 2 @CNT) as an efficient catalyst for Li-O 2 batteries. The amorphous catalyst contains abundant defects and vacancies as well as distorted atom arrangements, which provide sufficient active sites for reactions and enhance the affinity for LiO 2 intermediates. As a result, the formation/decomposition mechanisms of Li 2 O 2 are reasonably regulated. An amorphous film-like Li 2 O 2 product forms and uniformly deposits on the surface of A-RuO 2 @CNT, thus achieving faster redox kinetics and smaller overpotential. When used in Li-O 2 batteries, the amorphous catalyst affords remarkably decreased charge overpotential and enhanced cyclic stability, which is superior to its crystalline counterpart.
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DOI
高影响因子
Sustainable Energy & Fuels
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2025
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IF 4.1
Chen Yang,Hongjian Zhang,Mingtao Zhu,Ping Li,Hao Wu,Qiushi Wang,Yong Zhang
Polyvinylidene fluoride (PVDF)-based electrolytes have attracted significant attention for their potential use in solid-state lithium batteries (SSLBs) due to their superior electrochemical performance and safety. However, their low ionic conductivity and uneven lithium deposition hinder the further application of PVDF-based electrolytes. Herein, this work focuses on incorporating Ba0.6Sr0.4TiO3 (BST) ferroelectric ceramics into PVDF to form composite solid-state electrolytes (CSEs). The BST ferroelectric ceramics can create an intrinsic electric field that facilitates lithium-ion transport and enables uniform Li deposition. In addition, benefiting from the high dielectric constant of BST and dipoles generated from the asymmetric structure, PVDF–BST CSEs achieve a high ionic conductivity (1.79 × 10−4 S cm−1) due to more free lithium ions, a wide electrochemical window of 4.8 V (vs. Li/Li+) and a high Li+ transference number (0.37). The assembled Li|PVDF–BST|Li symmetrical cells can steadily cycle for 1100 h at 0.1 mA cm−2 at 25 °C. The assembled Li|PVDF–BST|LiFePO4 cells show long-term cycling stability with a capacity retention of 85.6% after 100 cycles at 0.5C and a capacity retention of 81.4% after 200 cycles at 1C. This work provides a new strategy for improving the performance of the PVDF-based electrolytes by incorporating ferroelectric ceramics.
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DOI
高影响因子
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