Frontiers in Chemistry
·
2020
·
IF 3.693
Yongliang Cui,Sufu Liu,Bo Liu,Donghuang Wang,Yu Zhong,Xuqing Zhang,Xiuli Wang,Xinhui Xia,Changdong Gu,Jiangping Tu
The notorious lithium dendrite growth, causing the safety concern, hinders the practical application of high-capacity Li metal anodes for rechargeable batteries. Here, a robust and highly ionic conductive solid electrolyte interphase (SEI) layer to protect Li metal anode is in-situ constructed by introducing trace additive of tetrapotassium heptaiodobismuthate (K4BiI7) into electrolyte. The K4BiI7-added electrolyte enables Li metal anode to display a stable cycling for over 600 cycles at 1.0 mA cm−2/1.0 mAh cm−2 and over 400 cycles at 5.0 mA cm−2/5.0 mAh cm−2. In situ optical microscopy observations also conform the suppression of Li dendrites at high current density. Moreover, the in-situ SEI layer modified Li anode exhibits an average Coulombic efficiency of 99.57% and less Li dendrite growth. The Li-S full sells with the modified electrolyte also show improved electrochemical performance. This research provides a cost-efficient method to achieve a highly ionic conductive and stable SEI layer toward advanced Li metal anodes.
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高影响因子
IONICS
·
2021
·Vol. 28
·期 1
·191-200
·
IF 2.817
Chen Zi-Liang,Gu Yi-Jing,Luo Gui-Yang,Huo Yong-Lin,Wu Fu-Zhong
Although researchers have previously examined whether graphene modified by sulfur can improve the electrochemical performance of LiFePO 4 /C composites, they have rarely examined whether it can do so during the synchronous synthesis of LiFePO 4 /C and sulfur-modified reduced graphene oxide (SG) via a one-step hydrothermal method. To answer this question, a series of olivine structure LiFePO 4 /C composites wrapped with SG were investigated. Subsequently, we found that SG can form a three-dimensional conductive network on the surface of the LiFePO 4 /C sample. In the process, XRD and HRTEM tests were undertaken as well. From the XRD test, the results show that SG does not affect the olivine structure of LiFePO 4 /C. In the HRTEM experiment, clear lattice fringes and a uniformly coated carbon layer on the sample surface were observed. Alongside these results, there were 4 others. First, the charge–discharge data showed that the electrochemical performance of the samples could be increased by SG modification. Second, sample S2 with a mass ratio of Na 2 S to rGO of 1:10 shows the best specific discharge capacity and stability. Third, the specific capacity of S2 is 163 mAhg −1 at 0.2 C, and the capacity retention is 108.23% even after 200 cycles at a magnification of 10 C. Fourth, according to EIS, the charge migrating resistance of S2 is 226.4 Ω, and the lithium-ion diffusion coefficient is 2.41 × 10 −14 cm 2 ·S −1 . The significance of these results is that they indicate that wrapping LiFePO 4 /C with SG significantly contributed to the improvement of its electrochemical performance.
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高影响因子
Journal of Physical Chemistry C
·
2021
·
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
SOLID STATE IONICS
·
2015
·
IF 2.561
Xiaobing Huang,Yaoyao You,Yurong Ren,Haiyan Wang,Yuandao Chen,Xiang Ding,Beiping Liu,Shibiao Zhou,Fuqiang Chu
Improving the rate performance is still a major challenge for Li 2 FeSiO 4 cathode material for Li-ion battery. Herein, hollow spherical Li 2 FeSiO 4 /C microscale particles, consisting of carbon-coated primary nanoparticles (20–40 nm) have been fabricated by a spray drying-assisted method. The particle size of spherical Li 2 FeSiO 4 /C is 1–5 μm, which is suitable for commercial application. When used as a cathode material for Li-ion battery, the as-prepared Li 2 FeSiO 4 /C composite with 16.7 wt.% carbon exhibits a high discharge capacity of 165 mAh g − 1 at 0.2 C rate. At 0.5 C, 5 C and 10 C rates, the capacities of 151 mAh g − 1 , 111 mAh g − 1 , and 96 mAh g − 1 are observed, respectively, indicating superior rate performance. Meantime, good cycling stability is achieved with a capacity retention of 94.5% at a high current density of 2 C after 100 cycles. The excellent electrochemical performance is mainly ascribed to the improved ionic/electronic conductivity arising from the hollow spherical structure and carbon-coated primary nanoparticles . The spray drying process shows a great potential for the large scale production of high quality Li 2 FeSiO 4 /C composite.
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高影响因子
ACS Applied Materials & Interfaces
·
2017
·
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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高影响因子
ACS Applied Materials & Interfaces
·
2024
·
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
DALTON TRANSACTIONS
·
2021
·Vol. 50
·期 37
·13052-13058
·
IF 4.39
Hui Zheng,Changhao Ding,Han-Shu Xu,Lulu Tang,Huimin Liu,Lianwei Wei,Kaibin Tang
Several FeS-derived intercalated compounds (C2H8N2)xFeS and Ax(C2H8N2)yFeS (A = Li, Na) were successfully synthesized via a novel ammonothermal method. The powder X-ray diffraction (XRD) measurements reveal that the FeS intercalated samples have the same tetragonal crystal structure as the parent FeS. After intercalation, these three as-synthesized samples do not show superconductor behavior, which is confirmed by the magnetization and the electrical resistivity measurements. (C2H8N2)xFeS exhibits paramagnetic semiconductor behavior, while the newly synthesized Ax(C2H8N2)yFeS (A = Li, Na) shows antiferromagnetic semiconductor behavior. The absence of superconductivity in these FeS-derived compounds should be closely related to the iron vacancies in the FeS layer.
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高影响因子
Energies
·
2025
·Vol. 18
·期 12
·3205
·
IF 3.2
Yao Lv,Liqiu Shi,Jianfeng Yu,Shifei Huang
Sodium-ion batteries are renowned for their abundant reserves, cost-efficiency, safety, and eco-friendliness and are prime candidates for large-scale energy storage applications. The development of cathode materials plays a crucial role in shaping both the commercialization path and the ultimate performance capabilities of SIBs. To overcome the intricate synthesis challenges associated with pure-phase sodium-ion cathode materials, this study introduces an innovative and streamlined electrochemical Li+/Na+exchange process, successfully fabricating a high-capacity Ni-rich cathode material. This cathode material boasts a remarkable reversible capacity of 180 mAh g−1at 0.1 C and retains a high-rate capacity of 115 mAh g−1even at 5 C. Additionally, it exhibits exceptional cycling stability, retaining about 85% of its capacity at 1 C after 50 cycles and still maintaining a capacity greater than 60% after 100 cycles. The Na-NMA85 full cell preserves a discharge capacity of 110 mAh g−1after 100 cycles, with a capacity retention rate of 80%. This research underscores innovative strategies for designing ion-intercalation-based cathode materials that enhance battery performance, providing fresh perspectives for advancing high-performance battery technologies.
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产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2026
·
IF 19
Lu Zhou,Xinming Fan,Haojie Du,Gaoqiang Mao,Qian Wang,Yufang Chen,Xueyi Guo,Dawei Yu
This paper introduces a novel electrolyte additive, 3,5-bis(trifluoromethyl)phenyl isocyanate (3,5-Bis(CF 3 )PhNCO), designed to mitigate interfacial instability and structural degradation of single-crystal LiNi 0.92 Co 0.06 Mn 0.02 O 2 cathodes under 4.6 V high-voltage cycling. Distinct from conventional monofunctional additives, 3,5-Bis(CF 3 )PhNCO integrates strongly reactive -NCO groups and electronegative -CF 3 groups, enabling a unique synergistic working mechanism. The -NCO moiety scavenges moisture and neutralizes acidic species (e.g., HF) to suppress electrolyte hydrolysis, while the -CF 3 groups enhance hydrophobicity and induce preferential oxidative decomposition for the formation of a robust cathode-electrolyte interphase (CEI). Driven by this synergistic effect, the additive constructs a ∼20 nm nitrogen-rich CEI layer, which effectively alleviates uneven Li + deposition, stabilizes the valence states of transition metals, and inhibits microcracking of the NCM92 cathode-effects validated by focused ion beam (FIB) 3D reconstruction, X-ray absorption fine structure spectroscopy (XAFS), and COMSOL Multiphysics simulations. Electrochemically, with 2 wt.% additive incorporation, the cells achieved an excellent capacity retention of 87.08% after 150 cycles at a 0.5 C rate, while full cells maintained 86.67% of their capacity after 1400 cycles at 1 C. This work establishes theoretical and experimental frameworks for multifunctional additive design, offering critical guidance for developing high-energy-density, long-life lithium-ion battery cathodes.
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产品关联
DOI
高影响因子
Green Energy & Environment
·
2020
·Vol. 7
·期 4
·734-741
·
IF 6.395
Huiqin Wang,Fengchu Zhang,Jing Xia,Fei Lu,Bo Zhou,Ding Yi,Xi Wang
Up to now, three kinds of ion-storage mechanisms are summarized towards anode materials in lithium/sodium-ion batteries, but they have low capacity and poor cyclic performance. Therefore, it is necessary to develop a new approach to optimize ion storage. Herein, we report an adsorption/desorption storage route through engineering electronic structure of cation-deficient Ti 1-x O 2 nanosheets. Ti 1-x O 2 nanosheets indeed exhibit higher capacity (332.1 mA h g −1 vs. 137.7 mA h g −1 for LIBs, 195.7 mA h g −1 vs. 111 mA h g −1 for SIBs), and more stable cyclic performance (296 mA h g −1 vs. 99 mA h g −1 for LIBs, 178.1 mA h g −1 vs. 80.2 mA h g −1 for SIBs after 100 cycles) at 0.1 A g −1 than TiO 2 nanosheets. Kinetics analysis and density functional theory (DFT) calculations reveal that electronic structures of vacancy within Ti 1-x O 2 nanosheets encourage a novel adsorption–desorption storage route. These results highlight the benefits of the engineered electronic structures within electrode material and implement novel ion-storage mechanism towards broad energy storage applications.
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高影响因子
Journal of Energy Chemistry
·
2022
·
IF 13.599
Shu Yang,Guanjie Li,Xiaoyan Lin,Changyong Mo,Xianggui Zhou,Lijiao Quan,Kuan Zhou,Suli Li,Hai Wang,Weishan Li
Lithium-metal battery based on Ni-rich cathode provides high energy density but presents poor cyclic stability due to the unstable electrode/electrolyte interfaces on both cathode and anode. In this work, we report a new strategy to address this issue. It is found that the cyclic stability of Ni-rich/Li battery can be significantly improved by using succinic anhydride (SA) as an electrolyte additive . Specifically, the capacity retention of LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)/Li cell is improved from 14% to 83% after 200 cycles at 1 C between 3.0 and 4.35 V by applying 5% SA. The underlying mechanism of SA contribution is understood by comparing the effects of malic anhydride (MA) and citraconic anhydride (CA), both of which share a similar molecular structure to SA but show different effects. On anode side, SA can but MA and CA cannot form a protective solid electrolyte interphase (SEI) on Li anode. On cathode side, three anhydrides can suppress the formation of hydrogen fluoride from electrolyte oxidation decomposition, but SA behaves best. Typically, MA shows adverse effects on the interface stability of Li anode and NCM811cathode, which originates from its high acidity. Though the acidity of MA can be mitigated by substituting a methyl for one H atom at its C C bond, the substituent CA cannot compete with SA in cyclic stability improvement of the cell, because the SEI resulting from CA is not as robust as that from SA, which is related to the binding energy of the SEI components. This understanding reveals the importance of the electrolyte acidity on the Ni-rich cathode and the robustness of the SEI on Li anode, which is helpful for rationally designing new electrolyte additives to further improve the cyclic stability of high-energy-density Ni-rich/Li batteries.
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高影响因子
IONICS
·
2018
·Vol. 25
·期 6
·2595-2605
·
IF 2.347
Zhang Min,Ma Xiaoyan,Liu Yi,Ma Jingyu,Chen Fang,Zhang Qi
Polyhedral oligomeric silsesquioxane-poly(methyl methacrylate) 8 (POSS-PMMA 8 )/polyvinylidene fluoride (PVDF) hybrid gel polymer electrolyte (HGPE) membranes have been fabricated by using electrospinning along with the use of commercial polypropylene (PP) microporous membranes as its support; the corresponding HGPEs were obtained after being activated into liquid electrolytes. The goal of the study is to incorporate the high mechanical property of microporous PP membrane and superior electrochemical performance of electrospun gel polymer electrolyte to get the high-performance electrolyte for Li-ion battery. As an effective modifier, it is found that the introduction of POSS-polymer plays a vital role in enhancing many properties of HGPEs, and the influence of POSS-(PMMA 46 ) 8 content on overall properties of HGPEs is investigated. In specific, the HGPEs membrane with 12 wt% POSS-(PMMA 46 ) 8 displays a significant uniform fiber diameter with 720 nm and high electrolyte uptake of 322% due to the high porosity of 58%. Meanwhile, a great improvement in mechanical property is obtained with a tensile strength of 34.5 MPa, which is about 7 times of POSS-(PMMA 46 ) 8 /PVDF membrane without support. The interfacial resistance between the corresponding HGPEs and Li electrodes is significantly reduced and as low as 138 Ω. Furthermore, the LiFePO 4 /HGPEs/Li button cell is assembled and excellent cyclability is shown at 0.1 C and 0.5 C, respectively. The results demonstrate that POSS-(PMMA 46 ) 8 /PVDF HGPEs could be applied as a promising HGPE candidate for high-performance Li-ion batteries.
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高影响因子
危险品化学品经营许可证（带存储）