JOURNAL OF POWER SOURCES
·
2018
·
IF 6.945
Jing Gao,Chunshui Sun,Lei Xu,Jian Chen,Chong Wang,Decai Guo,Hao Chen
Due to flexible property and light weight, the lithiated Nafion membrane swollen with PC (PC-Li-Nafion) has been employed as both solid-state electrolyte and separator to fabricate solid-state Li-S cells. The electrochemical measurements of PC-Li-Nafion membrane show that its Li-ion transference number is 0.928, ionic conductivity of 2.1 × 10 −4 S cm −1 can be achieved at 70 °C and its electrochemical window is 0 ∼ +4.1 V vs. Li + /Li. It is observed that the Li dendrites are suppressed by using PC-Li-Nafion membrane due to its single-ion conducting property. The amounts of Li-Nafion resin binder and conductive carbon in the cathode are optimized as 40% and 10% respectively to make a balance of ionic and electronic conductivities . A thin-layer Li-Nafion resin with a thickness of around 2 μm is fabricated between the cathode and PC-Li-Nafion membrane to improve the interfacial contact and further enhance the specific capacity of the cell. When measured at 70 °C, the Li-S cell delivers a reversible specific capacity of 1072.8 mAh g −1 (S) at 0.05 C and 895 mAh g −1 (S) at 1 C. The capacity retention at 1 C is 89% after 100 cycles. These results suggest that high-performance solid-state Li-S cells can be fabricated with the Li-Nafion polymer electrolyte .
研究领域:
电化学
·
能源材料
·
固态电池
·
聚合物电解质
·
锂离子电池
·
电极界面工程
·
储能技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Chenyu Lin,Tianqi Yang,Haiyuan Zhang,Donghuang Wang,Wenkui Zhang,Yao Wang,Yang Xia,Hui Huang,Xinhui Xia,Yongping Gan,Xinping He,Xinyong Tao,Jun Zhang
Solid-state lithium metal batteries with high energy density and safety have gained increasing attention due to their potential applications. However, the practical use of solid electrolytes is hindered by several challenges. These include poor compatibility at the electrode–electrolyte interface, low ionic conductivity at room temperature, and fast capacity degradation. To address these issues, here we propose ternary strategies by in-situ cross-linked plastic crystal electrolyte (in-situ PCE) based on succinonitrile (SN). Through the in-situ polymerization of SN with polyacrylonitrile/poly(vinylidene difluoride) (PAN/PVDF) nanofibers separator, excellent mechanical strength and compatibility at the electrode–electrolyte interface are achieved. The cross-linked structure of thermally polymerized ethoxylated trimethylolpropane triacrylate (ETPTA) immobilizes the SN molecule, preventing its contact with the lithium metal and inhibiting irreversible side reactions. Additionally, a LiF-rich passivation layer is employed to further protect the SN at the electrolyte-lithium metal interface. The dual protection from ETPTA and LiF offers excellent stability to lithium. Hence, the in-situ PCE exhibits high ionic conductivity (0.79 mS cm −1 at 30 °C) and wide electrochemical window (4.56 V, vs Li + /Li). The cells exhibit excellent cycling stability and high-rate performance. LiFePO 4 //Li cells retain 96.6 % capacity after 1000 cycles at 10C rate. This study provides valuable insights into the development of high-performance solid-state electrolytes.
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子化学
·
固态离子学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Jingxiong Gao,Songyi Han,Haiming Hua,Jie Wu,Jing Zeng,Yuanyu Sun,Weiping Tang,Shuling Liu,Jinbao Zhao
To optimize the electrochemical behavior of NCM-based high-energy lithium-ion batteries (LIBs) in wide temperature ranges, Phenyl trifluoromethane sulfonate (PTM) is demonstrated as the novel electrolyte additive to enhance the electrochemical behavior of LiNi 0·6 Co 0·2 Mn 0·2 O 2 /graphite cells at 25 °C, −20 °C and 45 °C. The cells with 1.0 wt% PTM-containing electrolyte deliver 80.6% capacity retention after 350 cycles at 25 °C, 73.4% after 100 cycles at −20 °C, and 82.6% after 300 cycles at 45 °C, which are significantly higher than that in standard electrolyte (STD), corresponding to 36.4% at 25 °C, 40.3% at −20 °C, and failure at 45 °C, respectively. According to density functional theory (DFT) simulations and quantitative calculations, the PTM preferentially reduces on the anode and oxidizes on the cathode to participate in the formation of solid electrolyte interphase (SEI) films. In addition, the scanning electron microscopy (SEM), Transmission electron microscope (TEM), X-ray photoelectron spectroscopy (XPS) and other analysis suggest that the formed SEI films are thinner and more stable for the electrolyte containing PTM, and the formed SEI films effectively control the decomposition of carbonate-based electrolytes and greatly decrease the increased resistance during the cycle.
研究领域:
电化学
·
材料科学
·
能源存储
·
锂电池技术
·
界面化学
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2023
·Vol. 9
·期 11
·2300392
·
IF 6.2
Guangliang Li,Lingxian Kong,Qi Su,Xianhua Tan,Xuning Zhang,Zhiyong Liu,Tielin Shi,Guanglan Liao,Bo Sun
Few-layer black phosphorus (FL-BP) shows great potential in infrared polarization-sensitive photodetection due to its narrow bandgap and strong in-plane anisotropy. However, FL-BP is easy to be oxidized and degraded, which severely restricts its applications. Herein, a simple and scalable in situ interfacial passivation method based on pentacene film is reported to enhance the ambient stability of FL-BP as well as achieve n-type doping for improved polarization-sensitive photoimaging. High crystal quality FL-BP flakes with intrinsic anisotropy are prepared by electrochemical exfoliation. The morphology and Raman spectra of FL-BP/pentacene exhibit excellent stability 28 days after passivation. In addition, the hole mobility is significantly enhanced and dark current is substantially suppressed due to the interfacial passivation and n-type doping effect. The FL-BP/Pentacene based photodetector shows a broadband response from visible to near-infrared with good stability. The photoresponsivity under 915 nm illumination is calculated as 2.2 mA W −1 with an anisotropy ratio of 1.29. Furthermore, the polarization imaging under the irradiation at zigzag and armchair directions directly reveals the strong infrared polarization-sensitive imaging capability of FL-BP/pentacene. This work also opens up new avenues to enhance the photoresponse and stability of various optoelectronics based on similarly unstable 2D materials.
研究领域:
纳米材料学
·
光电子学
·
二维材料
·
半导体物理
·
红外成像
·
表面科学
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2020
·
IF 3.107
Yayu Guo,Huilan Guan,Wenxiu Peng,Xuelei Li,Yue Ma,Dawei Song,Hongzhou Zhang,Chunliang Li,Lianqi Zhang
Li 7 P 3 S 11 (70Li 2 S·30P 2 S 5 ) sulfide is a promising electrolyte candidate for all-solid-state lithium batteries (ASSLBs) owing to its high ionic conducivity and wide electrochemical stability window. However, the sensitivity to moisture and the poor interfacial compatibility with electrodes limit the conventional application of Li 7 P 3 S 11 . Herein, we present a substitution strategy to produce a O-incorporated 70Li 2 S·(30-x)P 2 S 5 ·xP 2 O 5 (mol%) sulfide electrolyte to address above issues. The elaborately designed electrolyte is prepared via wet vibration ball milling technique with P 2 O 5 substitution content of 1, 3 and 5. As a result, the 70Li 2 S·27P 2 S 5 ·3P 2 O 5 electrolyte displays the highest ionic conductivity of 2.61× 10 −3 S cm −1 which outperforms than that of pristine Li 7 P 3 S 11 (ionic conductivity of 1.35 × 10 −3 S cm −1 ) and the assembled LiCoO 2 @LiNbO 3 /70Li 2 S·27P 2 S 5 ·3P 2 O 5 /Li-In ASSLB exhibits the superior capacity retention of 93.2% after 100 cycles at 0.5C. The reason for the developed electrochemical performance lies in the substitution of the non-bridging sulfur atom with bridging oxygen atom, from which the interaction between electrolyte and lithium ions is weakened, thereby the rapid transfer of lithium ions is facilitated. Furthermore, Raman and XRD results indicate that the adverse interfacial reactions are suppressed through P 2 O 5 substitution. This work suggests that P 2 O 5 substitution is an effective strategy for sulfide electrolyte toward high energy all-solid-state lithium batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
电池技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2021
·Vol. 48
·期 6
·8579-8588
·
IF 4.527
Sunyi Shen,Shaolei Song,Jinming Wang,Rong Li,Xingchao Li,Qiang Zhen
Microstructure control and multiple compounding methods in the synthesis stage can enhance microwave absorption performance of microwave absorbents. In this work, we successfully synthesized binary TiB 2 –SiC (TsBC) powders with hexagonal sheet (TiB 2 ) and particle (SiC) interlocking structures by sol-gel carbothermal reduction method. We investigated the effect of raw material ratio and synthesis temperature on the synthesized powders and evaluated the microwave absorption properties of the synthesized TsBC powders. It was found that the TsBC absorber exhibited excellent microwave adsorption properties with the minimum Reflection Loss ( R L ) reached −21.8 dB at 17.4 GHz corresponding to the thickness of 4 mm. This excellent performance was attributed to the interfacial polarization between TiB 2 –SiC interfaces and the multiple reflections between the sheet-particle interlocking structures.
研究领域:
材料科学
·
功能材料
·
复合材料
·
电磁学
·
无机非金属材料
✓ 已验证
DOI
高影响因子
Nano Energy
·
2019
·
IF 15.548
Xiaodong Li,Sheng Fu,Shiyu Liu,Yulei Wu,Wenxiao Zhang,Weijie Song,Junfeng Fang
Operational stability remains the foremost concern delaying the commercialization of perovskite solar cells (PSCs). Ions diffusion from iodine-rich perovskite layer to metal electrode is one main reason for the irreversible devices degradation. Here we introduce chemically crosslinked TMTA (trimethylolpropane triacrylate) at both bulk perovskite layer and perovskite/PCBM interface to suppress the ions diffusion toward electrode. The TMTA in perovskite layer suppresses ions migration along grain boundaries and TMTA at perovskite/PCBM interface blocks ions diffusion toward electrode, owing to its continuous network structure and chemically inert nature. Diffusion experiment, permeation experiment and resistive random-access memory (RRAM) investigation confirm the effectively blocked ions diffusion in PSCs with TMTA whether under heat, light or electric field conditions. The resulting PSCs exhibit 7-fold improvement in operational stability at elevated temperature of 60 °C, retaining ~80% of initial efficiency after maximum power point tracking for 1000 h under continuous illumination. The PSCs with TMTA also exhibit good thermal stability and retain over 90% of the initial efficiency after aging at 60 °C for 1000 h.
研究领域:
材料科学
·
光伏技术
·
纳米材料
·
能源化学
·
器件物理
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2015
·
IF 4.504
Xinhe Yang,Zicheng Zuo,Haiyan Wang,Quanbin Chen,Hui Zhang,Zhenlei Huang,Borong Wu,Henghui Zhou
A one-step synthesis method is developed to prepare the Li[Ni 0.5 Co 0.2 Mn 0.3 ]O 2 (NCM 523) cathode with uniform tungsten-coating layer for lithium-ion battery . Such modified material shows similar properties with the bare NCM 523 in terms of the primary particles, secondary structure , and specific capacity. With W coating layer , the NCM 523 gives remarkable improvement in the long-term capacity retention in the half-cell testing, which is sharply inconsistent with the result from the full-battery tests, indicating a contradiction between the half-cell and full-battery tests in some case. After further investigations, such conflict between the half-cell and full-cell tests in evaluating the W-coating strategy is attributed to the dissolution of Li 2 WO 4 layer in the electrolyte, which probably destroys the solid electrolyte interface (SEI) on the graphite anode and irreversibly consumes the active lithium ions for renovating SEI in full-cell testing. These results will benefit researchers in the area of lithium-ion batteries to fully understand the differences between the half-cell and full-cell testing, and develop the effective strategies for cathode modifications.
研究领域:
电化学
·
材料科学
·
能源存储
·
电池技术
·
表面改性
·
固态离子学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2017
·Vol. 7
·期 63
·39523-39529
·
IF 3.108
Wenhui Zhang,Yang Ding,Yue Jiang,MingZhi Zheng,Sujuan Wu,Xubing Lu,Min Zeng,Xingsen Gao,Qianming Wang,Guofu Zhou,Jun-ming Liu,Krzysztof Kempa,Jinwei Gao
Interface engineering has been proved to be a practical strategy to enhance power conversion efficiency (PCE) and stability of perovskite solar cells. Recently approaches involving ultra-thin layer deposition and vacuum-processing, while improving PCE, increase the processing complexity, and thus the overall cost. In this paper, we demonstrate a high-efficiency inverted planar perovskite solar cell, obtained with a simple wet-chemistry based, room-temperature, and cost-effective process, which synthesizes two interfacial layers: solution processed molybdenum oxide (named s-MoOx) for anode and titanium(IV) oxide bis(2,4-pentanedionate) (TOPD) for cathode buffer layers. Steady-state photoluminescence (PL), time resolved photoluminescence (TRPL) and electrochemical impedance spectroscopy (EIS) are conducted to characterize the charge transport properties, confirming an enhanced charge extraction efficiency and a suppressed charge recombination. In addition, the introduction of the interfacial layers facilities formation of an ohmic contact with the metal electrode, reducing the charge transfer resistance and increasing the FF to as high as 80.7%. The optimized solar cells achieve the best PCE of 16.04% which far exceeds the PCE of devices without these interfacial layers (PCE = 11.2%).
研究领域:
材料科学
·
能源科学
·
纳米技术
·
表面与界面化学
✓ 已验证
DOI
高影响因子
Progress in Natural Science-Materials International
·
2019
·Vol. 29
·期 3
·310-315
·
IF 3.31
Chao Hou,Ke Yang,Fawei Tang,Haibin Wang,Xuemei Liu,Xiaoyan Song
A micro-nano combined composite with Li-Si alloy nano-domains in three-dimensional carbon network was prepared as a novel electrode material. The carbon network constrained the volume contraction and promoted effectively charge transfer of the whole active material. Meanwhile, the abundant interfaces between Li-Si alloy and carbon bound by Li-C ionic bonds, not only enhanced the delithiation at interface but also ensured the structural integrity. The present composite exhibited excellent electrochemical performance. The specific capacity at the first lithiation was as high as 1133 mAh g −1 at a current density of 0.1 A g −1 , which is superior to those reported for the core-shell structured nanoparticles. The Coulombic Efficiency at the first cycle was 90.4% and kept stable at more than 99.0% after only 10 cycles. The capacity retention was nearly twice as that of the incompact mixture of Li-Si nanoparticles and carbon. The energy density of the full cell constructed by the present composite and sulfur was evaluated to be 3 times as high as that of the commercial lithium-ion batteries. This work provides a new universal strategy for developing Li-rich anode materials with high combination properties and low cost.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固态物理
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2018
·
IF 2.751
Wenping Zha,Yinghui Xu,Fei Chen,Qiang Shen,Lianmeng Zhang
In this work, Li 7 La 3 Zr 2 O 12 (LLZO)-based membrane electrolyte, which has good flexibility and can be easily mass-produced, is proposed to address the intrinsic defects of ceramic electrolytes . The LLZO-based membrane electrolyte is electrochemically stable in the voltage range of 0–5.2 V vs. Li/Li + due to the good oxidative stability of LLZO. We also develop a simple and low-cost approach to fabricate the all-solid-state lithium battery (ASSLB). Wet coating and hot pressing are applied to form a continuous and homogeneous electrolyte layer on a cathode layer. Thanks to the integrated preparation process, there is no obvious interface between the cathode layer and the electrolyte layer, hence reducing the interface resistance. The Li/LiFePO 4 batteries exhibit desirable cycling performance at 60 °C, which deliver a maximum discharge specific capacity of 151.6 mAh·g −1 at 0.1C and maintain 97.8% of the capacity after 50 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
·
固态离子学
·
先进电池技术
✓ 已验证
DOI
高影响因子
Alexandria Engineering Journal
·
2024
·
IF 6.2
Hong Zhang,Ming Chen,Tiantian Liang,Zanpeng Zhang,Changhui Yang
The use of nanocarbon materials to enhance the toughness of fragile cementitious materials has attracted increasing attention for investigation. This study examines the effects of incorporating graphene oxide (GO) into NaOH-activated slag (AAS) pastes and mortars, focusing on workability, phase composition, mechanical properties, and the local mechanical properties of the interfacial transition zone (ITZ) between sand and paste. The experimental results indicate that the addition of GO decreases the flowability of NaOH-AAS pastes, with noticeable aggregation at concentrations above 0.03 wt%. Furthermore, GO enhances the hydration degree of ground granulated blast furnace slag (GGBS), leading to an increased amount of C-A-S-H gel without introducing new phases. In terms of macro performance, incorporating 0.03 wt% GO significantly improves the compressive and flexural strengths of NaOH-AAS mortars by 10.6 % and 17.9 %, respectively. Additionally, the presence of GO reduces the ITZ thickness from 30 to 15 micrometres in NaOH-AAS mortars, which likely contributes to the enhanced mechanical performance.
研究领域:
材料科学
·
水泥基材料
·
纳米复合材料
·
建筑材料化学
·
界面工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）