JOURNAL OF ALLOYS AND COMPOUNDS
·
2023
·
IF 6.2
Yanhua Zhang,Yuhang Mei,Xinglong Gao,Yumei Xiao,Zijun Tang,Xing Xiang,Jiadong Deng
The lithium dendrite problem of Li 7 La 3 Zr 1.4 Ta 0.6 O 12 (LLZTO) solid electrolyte restricts the practical application and development of all-solid-state lithium batteries (ASSLBs). Herein, a LiPON interlayer with Li + conductive and electron non-conductive dynamic properties is constructed at the Li/LLZTO interface. Results show that the electronic conductivity of solid electrolyte after LiPON modification decreased by nearly three orders of magnitude, indicating that it has good ability to hinder electron conduction . The interlayer enhances the wettability between the Li metal anode and LLZTO, resulting in a decrease of battery resistance from 3400 Ω to 700 Ω. The critical current density of the ASSLBs increase from 0.1 mA cm −2 to 1.2 mA cm −2 at room temperature, and the battery cycle number increase from 31 h to over 1000 h. XPS deep etching results show that the LiPON/LLZTO interface has good electrochemical stability. The Kelvin probe force microscope displays a sharp increase in potential within the LiPON interlayer, indicating its successful hindrance of electron conduction to the solid electrolyte. The effective inhibition of lithium dendrites growth is due to LiPON can promote the Li + transmission from LLZTO solid electrolyte to Li anode, and also hinder the electron conduction to LLZTO to form lithium dendrites.
研究领域:
材料科学
·
电化学
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能源存储
·
固态电池
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界面工程
✓ 已验证
DOI
高影响因子
SYNTHETIC METALS
·
2016
·
IF 2.299
Qiang Zhao,Junhua Chen,Fubin Luo,Lu Shen,Ying Wang,Kun Wu,Mangeng Lu
Nanostructure of ordered polyaniline-graphene (PANI-rGO PMAS ) hybrid nanomaterials is assembled based on poly(2-methoxyaniline-5-sulfonic acid) (PMAS) functionalized reduced graphene oxide (rGO PMAS ) nanosheets. The presence of PMAS not only improves dispersibility of reduced graphene oxide nanosheets, but also plays a key role for heterogeneous nucleation of polyaniline (PANI) nanorods . The formation mechanism of ordered PANI-rGO PMAS hybrid nanomaterials was studied in details by using field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM) and ultraviolet-visible spectrophotometry (UV–vis). The conductivity of PANI-rGO PMAS hybrid with 17 wt% rGO PMAS is as high as 4480 S/m, compared with 2.93 S/m for pure PANI. The cyclic voltammetry tests indicate that, PANI-rGO PMAS containing 2 wt% rGO PMAS possesses fast response to redox reactions and excellent reversible stability. It has a high specific capacitance of 385 F g −1 at the scan rate of 10 mV s −1 with potential ranges from −0.2 to 0.8 V. This ordered polyaniline-graphene hybrid has potential applications for flexible supercapacitors, sensors, batteries, electromagnetic materials and thermoelectric materials, etc.
研究领域:
材料科学
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纳米科技
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高分子化学
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电化学
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能源材料
✓ 已验证
DOI
高影响因子
SOLID STATE IONICS
·
2014
·
IF 2.112
Jing Yang,Zhen Huang,Bingxin Huang,Jing Zhou,Xiaoxiong Xu
NASICON-type structure lithium ion conductors have been considered as promising solid electrolytes due to its very high Li + -ion conductivity and chemical stability. In this paper, NASICON-type structured Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) glass–ceramics are prepared from crystallization of glass powders, which are obtained by a simple melt-quench method. NH 4 H 2 PO 4 , H 3 PO 4 , P 2 O 5 and H 3 PO 4 &Al(PO 3 ) 3 are used as phosphorus sources, respectively. The obtained LAGP glass–ceramics are systematically characterized with X-ray diffraction, field emission scanning electron microscopy , differential scanning calorimetry and AC impedance spectroscopy . The different impurities are formed depending on the phosphorus sources, which further influence the microstructure. As a result, the lithium ion conductivity is significantly affected by the phosphorus sources. The highest conductivity of 5.21 × 10 − 4 S·cm − 1 is obtained when H 3 PO 4 is used as the phosphorus source under optimum conditions.
研究领域:
材料科学
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固态离子学
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无机非金属材料
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能源材料
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电化学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2024
·Vol. 14
·期 1
·147-153
·
IF 3.9
Hongzheng Li,Ying Li,Bo Li,Wenlong Huang,Yushi Ding
ReNiO3 (Re = Pr, Sm, Eu) solid electrolytes were prepared by the sol–gel method, which were sintered in a pure oxygen atmosphere of 20 MPa at 1000 °C for 24 hours. The DC resistivities of the three materials in air and in a hydrogen-containing atmosphere were tested respectively. The resistivities in the hydrogen-containing atmosphere were about 102, 104, and 105 times higher than those in air and XPS analysis showed that after 10%H2–Ar treatment, the proportion of Ni2+ of PrNiO3, SmNiO3 and EuNiO3 increased successively. The proton transport number of PrNiO3 was lower than 0.5 at 50–500 °C, and SmNiO3 and EuNiO3 were almost pure proton conductors below 200 °C. The conductivities of SmNiO3 and EuNiO3 were 1.08 × 10−4 S cm−1 and 1.83 × 10−5 S cm−1 at 200 °C in 5%H2–Ar. The hydrogen sensing properties of SmNiO3 and EuNiO3 show that the measurement results of the two materials were accurate in the range of 0.5–10% H2.
研究领域:
材料科学
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固态离子学
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能源材料
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无机化学
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传感器技术
✓ 已验证
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·Vol. 46
·期 8
·10917-10924
·
IF 3.83
Li Yang,Qiushi Dai,Lei Liu,Dingsheng Shao,Kaili Luo,Sidra Jamil,Hong Liu,Zhigao Luo,Baobao Chang,Xianyou Wang
Solid electrolytes could address the increasingly urgent safety and energy density concerns of lithium-ion batteries. Among several kinds of solid electrolytes, Ta-doped Li 7 La 3 Zr 2 O 12 (Ta-LLZO) became a research hotspot because of its high Li-ion conductivity and chemical stability against Li-metal and air. However, the preparation of high quality LLZO ceramic electrolyte via conventional air ambient sintering method is still a big challenge due to the serious “Li-loss” and abnormal grain growth phenomenon during the long-time high-temperature sintering process . Herein, a new rapid ultra-high-temperature air ambient sintering method without mother powder (MP) is put forward for the preparation of high quality Ta-LLZO ceramic electrolyte. The rapid sintering strategy can effectively restrain “Li-loss”. Furthermore, it is demonstrated that the none-mother-powder method is superior to traditional mother-powder method. Ta-LLZO ceramics sintered without MP via this rapid sintering method own small grain size, tight grain boundary, dense microstructure and high conductivity. Specifically, the Ta-LLZO ceramic sintered at 1360 °C for 10 min without MP exhibits high conductivity (8.5 × 10 −4 S cm −1 at 25 °C) and high relative density (97%), which equate those made by hot pressing sintering method. Without MP, the sintering process can avoid a lot of material waste and simplify the operation process. Moreover, the rapid sintering process can sharply shorten sintering time and reduce energy consumption. Therefore, this low-cost high-efficient sintering strategy can be effectively used in the large-scale production of high-quality Ta-LLZO ceramic electrolyte.
研究领域:
材料科学
·
固态离子学
·
能源材料
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电化学
·
无机非金属材料
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电池技术
✓ 已验证
DOI
高影响因子
MACROMOLECULAR RAPID COMMUNICATIONS
·
2021
·Vol. 42
·期 22
·2100457
·
IF 5.734
Xiaobin Li,Ending Zhang,Jun Shi,Xiaoyan Xiong,Jiaming Lin,Qiang Zhang,Xiaohua Cui,Liqin Tan,Kun Wu
In the past two decades, ionic conductive hydrogel has attracted tremendous research interests for their intrinsic characteristics in the field of flexible sensor. However, synchronous achievement of high mechanical strength, satisfied ionic conductivity, and broad adhesion to various substrates is still a challenge. Herein, a novel zwitterionic composite hydrogel that displayed excited strechability (up to 900%), satisfied strength (about 30 kPa), high ionic conductivity (1.2 mS cm −1 ), and adhesion to polar and nonpolar materials is fabricated though the combination of waterborne polyurethanes (PU) and poly(sulfobetaine zwitterion- co -acrylamide) (SAm). Especially, this facile strategy demonstrates that PU has a synergistic effect on enhancing mechanical strength and ionic conductivity for ionic conductive hydrogel. Moreover, the hydrogel-based strain/stress sensor shows high sensitivity, wide sensing range, great stability, and accuracy for human body movements detecting and voice recognition. This novel ionic conductive hydrogel has promoted the development of wearable devices.
研究领域:
生物材料
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高分子科学
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柔性电子学
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生物医学工程
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传感器技术
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 40
·21265-21272
·
IF 11.301
Lei Gao,Hao Zhang,Yuechao Wang,Shuai Li,Ruo Zhao,Yonggang Wang,Song Gao,Lunhua He,Hai-Feng Song,Ruqiang Zou,Yusheng Zhao
Sodium-rich antiperovskite (NaRAP) ionic conductors have been considered promising inorganic electrolytes for all-solid-state sodium batteries due to their low fabrication cost, high sodium ionic conductivity and good structural tolerance. The high structural flexibility of NaRAPs allows variety of chemical substitutions to improve conductivity; in particular, the substitution of the anion cluster has effectively proved promoting Na+ migration, both experimentally and theoretically. Herein, we report an unexpected boost in Na+ ionic conductivity that climbs to 0.37 mS cm−1 at 485 K by introducing NO2− groups in the antiperovskite Na3ONO2 system. Its mechanism was fully investigated by neutron powder diffraction and DFT calculations, proving that the NO2− group on the lattice center, can utilize its terminal O2− anion to facilitate the Na+ migration via the Na–O interaction, when thermally excited at 485 K. The detailed migration path is also discussed by both maximum entropy method (MEM) and DFT calculations.
研究领域:
材料科学
·
固态离子学
·
无机化学
·
能源材料
·
计算材料学
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2021
·
IF 9.127
Fengchen Zhou,Xu-Sheng Yang,Jiangwen Liu,Jun Liu,Renzong Hu,Liuzhang Ouyang,Min Zhu
Owing to the high theoretic capacity (2596 mAh g −1 ) and suitable lithiation potential (～0.7 V vs. Li + /Li), Black phosphorus (BP) is considered as an ideal anode material for the fast-charging lithium-ion batteries. However, BP still faces the large volume change and low Li + transfer during the charge/discharge. In this work, a facile two-step high-energy ball milling method is developed to synthesis the black phosphorus@TiP 2 –C (CBP@TiP 2 –C) nanocomposite for the high-rate performance anode material, in which the conductive nanocrystalline TiP 2 is in-situ introduced and uniformly distributed into BP-C matrix. We reveal that the uniformly dispersed TiP 2 nanocrystals can enhance the electronic and ionic conductivities of active particles and the electrode reaction kinetics. The lithiation product cubic Li y TiP 4 phase is beneficial to release the stress, reduce the Li + diffusion energy barrier and accelerate the Li + extraction from LiP 3 upon delithiation . Moreover, the contact among different components can be improved by Ti–C and P–C bonds in the CBP@TiP 2 –C, thus ensuring excellent electric contact within the material and enhancing the structural stability of composites. As a result, the CBP@TiP 2 –C anode displays a high reversible capacity of 1007.4 mAh g −1 at 10.0 A g −1 and excellent capacity retention of 925.6 mAh g −1 after 500 cycles at 2 A g −1 .
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
固态化学
✓ 已验证
DOI
高影响因子
MATERIALS CHEMISTRY AND PHYSICS
·
2021
·
IF 4.094
Zhongxu Li,Shengzhao Zhang,Zhao Jiang,Dan Cai,Changdong Gu,Jiangping Tu
A novel cheap eutectogel (ETG) membrane based on the deep eutectic solvent (DES) immobilized poly (vinylidene fluoride-hexafluoro propylene) (PVDF-HFP) is proposed as a solid electrolyte for safe lithium metal batteries in this study. The composition of DES is optimized, which is prepared by mixing the N-methylacetamide (NMAC) and the lithium bis [(trifluoromethyl)sulfonyl]imid (LiTFSI) with a molar ratio of 4:1. The eutectogel is formed by incorporating 70 wt% DES into the PVDF-HFP, which is non-flammable and shows excellent mechanical properties. This ETG membrane electrolyte with a thickness about 25 μm possess a high ionic conductivity (3.05 × 10 −4 S cm −1 ) at room temperature and a wide electrochemical stability window (~5 V). The Li//ETG//LiFePO 4 full cells deliver an acceptable discharge capacity of ~133.9 mAh g −1 at 0.1C and room temperature after 100 charge-discharge cycles. The ETG membrane electrolyte can also endow the Li//ETG//LiFePO 4 pouch cell with flexibility and withstanding abuse operations, like nail penetration and cutting. We expect that the flexible and non-flammable eutectogel membrane will have implications for the use of DES based ionic liquids in the synthesis of advanced solid-state electrolytes for safer lithium batteries .
研究领域:
材料科学
·
电化学
·
能源存储
·
高分子物理
·
电池技术
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Heli Yu,Mingzhu Bi,Cuijuan Zhang,Tianjie Zhang,Xiaoning Zhang,Hongtao Liu,Jianli Mi,Xiangqian Shen,Shanshan Yao
Construction of high sulfur loading electrode is one of the effective ways to achieve high specific energy density lithium/sulfur batteries. Therefore, the optimization of polymeric binders has been considered as effective strategy to improve the volume changes of sulfur electrodes during charge/discharge processes. In this work, an effective route for the preparation of three dimensional polymeric binder (PAA-PANI) via multiple hydrogen bonds was developed and fabricated through in situ polymerization between polyacrylic acid (PAA) and polyaniline (PANI), which possess bifunctional effects on high sulfur loading cathodes in lithium/sulfur batteries. The carboxyl polar groups of PAA could effectively adsorb polysulfides and the conductive PANI enhance the electronic conductivity of the sulfur electrode. The three dimensional polymeric binder of PAA-PANI has enhanced the active material adhesion, mechanical properties and electronic conductivity, which decreased overpotential polarization, improved the lithium ions diffusion coefficient, and reduced the self-discharge. More importantly, the PAA-PANI functional binder could alleviate the expansion of high sulfur loading electrode. Taking advantages of PAA-PANI binder, the carbon nanotubes modified sulfur electrode (CNTs@S; sulfur content: 84.3 wt%) with PAA-PANI binder exhibits an initial discharge capacity of 906 mAh g –1 at 2.56 mA cm –2 (0.3 C) under a sulfur loading of 5.1 mg cm –2 . Even at higher current density of 8.54 mA cm –2 (1 C), the PAA-PANI binder electrode delivers a high capacity of 846 mAh g –1 . Moreover, with an extremely high areal sulfur loading of 17 mg cm –2 , the cathode shows an areal specific capacity of 16.7 mAh cm –2 .
研究领域:
电化学
·
能源材料
·
高能电池
·
功能高分子
·
界面化学
·
储能技术
✓ 已验证
DOI
高影响因子
CARBON
·
2024
·
IF 10.5
Ping He,Yu Zhang,Zhenguo Wang,Peng Min,Zhiming Deng,Lulu Li,Lvxuan Ye,Zhong-Zhen Yu,Hao-Bin Zhang
Graphene has been widely studied for its excellent properties of outstanding conductivity, strength , and flexibility. However, interlayer defects formed during the macroscopic assembly of graphene nanosheets will severely degrade the performance of graphene films. Herein, a strategy combined with trace carboxyl graphene oxide (GO), mild reduction, and chemical crosslinking is employed to minimize the interlayer defects for enhancing both the conductivity and mechanical strength of graphene films. The trace carboxyl feature of GO allows nanosheets to assemble orderly into highly oriented GO films . Subsequently, the mild chemical reduction preserves the highly oriented and packed microstructure. Coupling with further crosslinking by introducing conjugated molecules with pyrene terminal groups (1-pyrene butyric acid-1,6-hexane diamine, PHD) to provide extra π-π bonds, both the mechanical strength and conductivity of graphene films are improved to 548.4 MPa and 1.7 × 10 5 S m −1 , respectively. In addition, the graphene film with only ∼2 μm in thickness possesses an excellent electromagnetic interference shielding effectiveness (EMI SE) of ∼40 dB and a specific shielding effectiveness of up to 74 278 dB cm 2 g −1 in a wide frequency range of 8.2–40.0 GHz. Thus, this study provides an energy-saving fabrication route for mechanically strong, effective thermal management and EMI shielding films.
研究领域:
材料科学
·
纳米科技
·
高分子化学
·
功能材料
·
电磁屏蔽
·
热管理
✓ 已验证
DOI
高影响因子
International Journal of Refrigeration
·
2019
·
IF 3.177
Qing Cheng,Wang Pei
As different liquid desiccants show different dehumidification and operation characteristics, the comprehensive performance comparison between two liquid desiccants (LiCl and LiBr aqueous solutions) was conducted in this paper. The electronic conductivity of the LiBr aqueous solution was experimentally investigated and the electronic conductivity model of the LiBr solution was acquired. Compared with the LiCl solution, the LiBr solution has higher electronic conductivity within the concentration range of 20–40% and the temperature range of 20–60 °C, which means the ED regenerator using LiBr solution has lower electric resistance. The increase of the liquid desiccant concentration is beneficial to the moisture removal rate but harmful to the whole system COP and dehumidification efficiency, while the effect of the liquid desiccant temperature is opposite. Within the liquid desiccant temperature range of 20–30 °C, the whole system COP varies among 1 and 2.8 for the LiCl solution with the concentration of 38% at the exit of the ED regenerator, and it is among 2.5 and 5.8 for the LiBr solution with the concentration of 55% after regeneration. Using the LiCl solution can give the system the better dehumidification potential, while using LiBr solution can help the system to acquire the better whole performance and economy.
研究领域:
热能工程
·
暖通空调
·
化学工程
·
能源利用
·
环境控制技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）