Journal of Energy Chemistry
·
2016
·
IF 2.322
Xin Ding,Linlin Zhang,Yan Gao
Dye-sensitized photoelectrochemical cell (DS-PEC) is an especially attractive method to generate hydrogen via visible light driven water splitting. Electrolyte, an essential component of DS-PEC, plays a great role in determining the photoactivities of devices for water splitting. When using phosphate buffer (pH = 6.4) as electrolyte, the DS-PEC displayed much higher photoactivity than using 0.1 M Na 2 SO 4 (pH = 6.4) as electrolyte. The insight is phosphate anion gathers together to form a negative electrostatic field on TiO 2 surface, which increases the resistance in the TiO 2 /catalyst and electrolyte interface and validly reduces the charge recombination from TiO 2 to the oxidized catalyst.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Nature Energy
·
2025
·
IF 60.1
Zhao Chang-Xin,Li Zheng,Chen Bin,Chen Fu,Wang Chunsheng
Fast charging of high-energy batteries is critical for transportation electrification but remains challenging because the rapid rise in cell overpotential easily exceeds electrolytes’ fixed electrochemical stability window. Here we design a self-adaptive electrolyte with a dynamically expanding electrochemical stability window that increases in real time during charging, outpacing the rise in overpotential as the charging current intensifies. The self-adaptive electrolyte is a single-phase solution of salt and complementary oxidation- and reduction-resistant solvents at the cloud point composition but can undergo solvent separation to dynamically redistribute solvent components during charging. The oxidation-resistant solvents concentrate at the positive electrode and reduction-resistant solvents accumulate at the negative electrode, broadening the electrolyte stability window in real time during charging. Proof-of-concept experiments validate the versatility of this design in both aqueous zinc-metal and non-aqueous lithium-metal batteries, achieving high Coulombic efficiencies of negative electrodes and enhanced oxidative stability for positive electrodes.
研究领域:
储能技术
·
电化学
·
电池技术
·
材料科学
·
交通电气化
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-9
·
IF 17.694
Zhao Ruirui,Wang Haifeng,Du Haoran,Yang Ying,Gao Zhonghui,Qie Long,Huang Yunhui
Aqueous zinc batteries are appealing devices for cost-effective and environmentally sustainable energy storage. However, the zinc metal deposition at the anode strongly influences the battery cycle life and performance. To circumvent this issue, here we propose the use of lanthanum nitrate (La(NO 3 ) 3 ) as supporting salt for aqueous zinc sulfate (ZnSO 4 ) electrolyte solutions. Via physicochemical and electrochemical characterizations, we demonstrate that this peculiar electrolyte formulation weakens the electric double layer repulsive force, thus, favouring dense metallic zinc deposits and regulating the charge distribution at the zinc metal|electrolyte interface. When tested in Zn||VS 2 full coin cell configuration (with cathode mass loading of 16 mg cm −2 ), the electrolyte solution containing the lanthanum ions enables almost 1000 cycles at 1 A g −1 (after 5 activation cycles at 0.05 A g −1 ) with a stable discharge capacity of about 90 mAh g −1 and an average cell discharge voltage of ∼ 0.54 V.
研究领域:
电化学
·
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
·
2021
·Vol. 168
·期 12
·120548
·
IF 4.316
Mingwei Shi,Zailei Zhang,Man Zhao,Xianmao Lu,Zhong Lin Wang
For supercapacitors, high self-discharge rate is an inevitable issue that causes fast decay of cell voltage and loss of stored energy. Designing supercapacitors with suppressed self-discharge for long-term energy storage has been a challenge. In this work, we demonstrate that substantially reduced self-discharge rate can be achieved by using highly concentrated electrolytes. Specifically, when supercapacitors with 14 M LiCl electrolyte are charged to 0.80 V, the open circuit voltage (OCV) drops to 0.65 V in 24 h. In stark contrast, when the electrolyte concentration is reduced to 1 M, the OCV drops from 0.80 to 0.65 V within only 0.3 h, which was 80 times faster than that with 14 M LiCl. Decreased OCV decay rate at high electrolyte concentration is also confirmed for supercapacitors with different electrolytes (e.g., LiNO3) or at higher charging voltages (1.60 V). The slow self-discharge in highly concentrated electrolyte can be largely attributed to impeded electron transfer between the electrodes and electrolyte due to the formation of hydration clusters and reduced amount of free water molecules, thereby faradaic reactions that cause fast self-discharge are reduced. Our study not only supports the newly revised model about the formation of electric double layer with the inclusion of electron transfer, but also points a direction for substantially reducing the self-discharge rate of supercapacitors.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Device
·
2024
·
IF 0
Huping Yan,Ronghui Qi,Zhen Liu,Han Wang,Chuanshuai Dong,Li-zhi Zhang
Ambient moisture-enabled generators (MEGs) present significant potential but suffer from low efficiency. This study explored the synergistic enhancement of an electrical double layer (EDL) at the hydrogel-electrode interface in hydrogel-based MEGs, which improves directional ion movement to achieve excellent performance. Our MEGs feature asymmetric electrodes made of carbon nanotubes and a poly(acrylamide-co-acrylic acid) hydrogel as the conductive medium. The interaction between the COOH-rich hygroscopic hydrogel and the salt-doped upper electrode established a humidity gradient within the hydrogel and a strong interfacial EDL. Results indicate that the generator (1 × 1 cm 2 ) achieved an open-circuit voltage of 1.3 V, an instantaneous short-circuit current of 55.7 μA/cm 2 , and a usable power output of 2.34 μW/cm 2 . It also exhibited robust environmental adaptability, maintaining 0.8 V below 30% relative humidity (RH) and over 0.65 V between −10°C and 60°C. Unlocking the potential of EDLs significantly enhances MEG performance, broadening application prospects in distributed self-powered devices and large-scale moisture-to-energy generation.
研究领域:
材料科学
·
能源技术
·
环境工程
✓ 已验证
DOI
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Cong Gao,Wei Sun,Weitong Zhang,Qiao Zhang,Shanyi Guang,Qianjin Chen
Open-framework crystal structured vanadates have been extensively investigated as cathode materials for aqueous zinc-ion batteries (ZIBs). However, the inherent challenges of poor electronic conductivity and structural instability compromise the rate capability and overall cycle life. Herein, we first successfully synthesized octahedral MIL-101(V) and prepared the Zn 3 (OH) 2 V 2 O 7 ·2H 2 O@C (ZVOH@C) composite by in-situ electrochemical conversion of MIL-101(V)-derived crystalline V 2 O 3 and carbon composite (V 2 O 3 @C). The ZVOH@C composite of open-framework crystal structured Zn 3 (OH) 2 V 2 O 7 ·2H 2 O and conductive carbon skeleton not only possesses more active sites, more stable crystal structure and higher electrical conductivity , but also provides faster Zn 2+ diffusion kinetics. As expected, the ZVOH@C composite electrode exhibits excellent capacity of 506.3 mAh/g at a current density of 1.0 A/g, exceptional rate performance (375.7 mAh/g at 20.0 A/g), and impressive long-term cycling stability, maintaining 314.5 mAh/g over 5000 cycles at 20.0 A/g. This study demonstrates a promising method for designing new cathode materials through in-situ electrochemical synthesis for ZIBs .
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
CARBOHYDRATE POLYMERS
·
2025
·
IF 12.5
Yuefei Zou,Wanlin Wu,Tian Xia,Jiangqi Zhao,Qunhao Wang,Wei Zhang,Canhui Lu
To keep pace with the fast development of portable and wearable electronics, considerable public and scientific attentions have been paid to the flexible energy storage devices with characteristics of light weight, low cost and high electrochemical performance. In this work, we demonstrate a feasible strategy to fabricate novel strand-shaped electrodes from the biomass of Juncus effusus (JE), which can be easily integrated into flexible and rechargeable Zn-MnO 2 batteries with high electrochemical performance. Notably, JE has a very unique three dimensional (3D) triangular-like hollow network microstructure, which greatly favors active material loading, charge transfer and ion diffusion. The obtained aqueous battery presents an excellent specific capacity of 325 mAh g −1 at the current density of 0.3 A g −1 , as well as stunning cycling stability for up to 4000 cycles with 127.53 % retention of the initial capacity. Remarkably, when assembled with a gel electrolyte, the quasi-solid-state battery can work normally under various extreme conditions, including bending, hammering, burning, soaking and puncturing. In addition, due to the high flexibility, the electrodes can be woven in parallel into a textile to form an energy supply unit and successfully power an electronic watch, demonstrating high potential of JE in the fabrication of flexible energy storage devices.
研究领域:
材料科学
·
能源存储
·
可持续发展
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Qiyue Chen,Yikang Zhou,Xiaoyun Zhan,Zewen Sun,Qi Zhou,Lili Liu,Lijun Fu,Xinhai Yuan,Yuhui Chen,Xu Liu,Yuping Wu
Solid-state lithium metal batteries (SSLMBs) represent a prime direction for next-generation high-energy-density storage technologies. As the central component for developing SSLMBs, current research focuses on designing solid-state electrolytes featuring high ionic conductivity and low electronic conductivity, along with low cost. However, great challenges are encountered. This work develops a composite solid electrolyte (CSE) consisting of a doped Li4Ti4.95Zr0.05O12 (LTZO1) and poly(vinylidene fluoride) (PVDF), which has a network structure that enables rapid ion conduction and electron blocking. Density functional theory calculations confirm that Zr doping can get a reduced energy barrier for Li+ transport, with ionic conductivity increasing from 0.228 mS cm–1 to 0.665 mS cm–1 and dramatically suppressing its electronic conductivity from 0.11 mS cm–1 to 2.4 × 10–6 S cm–1. The optimized CSE exhibits enhanced ionic conductivity from 0.171 mS cm–1 to 0.581 mS cm–1, further weakens electronic conductivity, and has a critical current density of up to 5.5 mA cm–2. These excellent properties make solid-state batteries such as Li|LTZO1|LiFePO4 and Li|LTZO1|NCM811 achieve good performance, including capacity and cycling. This study provides an effective strategy for preparing practical CSEs for SSLMBs.
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
产品关联
DOI
PubMed
高影响因子
IONICS
·
2022
·Vol. 28
·期 7
·3453-3460
·
IF 2.961
Chen Fuhua,Guo Hao,Zhao Lili,Chu Ying,Wang Xueying,Zhu Yongping
Traditional cathode materials can no longer meet the development needs of thermal batteries, and the research of new cathode materials is imminent. In this study, WS 2 was successfully prepared by a simple one-step synthesis method. X-ray photoelectron spectroscopy (XPS) showed that it has good electrical conductivity, its bandgap had been calculated by ultraviolet–visible diffuse reflectance spectroscopy (UV-visDRS), and its thermal decomposition temperature exceeded 1000 °C by thermogravimetric (TG) analysis. Due to the high decomposition temperature and high electronic conductivity of WS 2 , LiBr–LiCl–LiF electrolyte with high ionic conductivity but the high melting point was selected. The structure and composition of WS 2 and LiBr–LiCl–LiF after reaction at high temperature (500 °C) were studied, and WS 2 was found to have good compatibility with ternary lithium electrolyte. Assembling Li–B/LiBr–LiCl–LiF/WS 2 single thermal battery, the discharge specific capacity is 952As g −1 at 300 mA cm −2 and cutoff voltage of 0.97 V. And the internal resistance of the single thermal battery is 11.87 mΩ under the super large pulse current density of 5A cm −2 . This further advances the application of WS 2 in thermal batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2025
·
IF 5.5
Yuanlang Wan,Xuefang Xie,Shuang Zhou,Weihang Li,Jingkang Ma,Yaqin Zhou,Yijian Song,Ji Zhou,Anqiang Pan
Li3VO4 (LVO) presents significant advantages in cost and capacity, making it a promising candidate for next-generation lithium-ion battery (LIB) anodes. However, its low electronic conductivity hampers practical applications. Herein, we report a Sm-modified Li3VO4/C composite (LSVO/C) designed for high-performance LIBs. Sm doping introduces additional defects and optimizes the electronic structure of Li3VO4, resulting in a significantly enhanced electronic conductivity (2.94 × 10–3 S cm–1) of the composites. Furthermore, the carbon-fiber-based framework effectively maintains structural stability during cycling, facilitating superior ion transport kinetics. Benefiting from these enhancements, the LSVO/C composite achieves remarkable discharge capacities of 379.5 mAh g–1 at 0.25 C and 260.1 mAh g–1 at 12.5 C. Additionally, an LSVO/C||NCM111 full cell, using LiNi1/3Co1/3Mn1/3O2 (NCM111) as the cathode, retains a discharge capacity of 50.5 mAh g–1 after 1000 cycles at 3.0 C, highlighting the potential of LSVO/C for practical applications. This unique method in preparing anode material will open new gates for highly efficient LIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
产品关联
DOI
高影响因子
DALTON TRANSACTIONS
·
2022
·Vol. 51
·期 18
·7076-7083
·
IF 4.569
Bo Gu,Chenyang Zhan,Bing Heng Liu,Gang Wang,Qian Zhang,Ming Zhang,Zhongrong Shen
Perovskite-structured (ABO3) lithium lanthanum titanate (LixLa(2−x)/3TiO3, LLTO) is widely used in all solid state lithium ion batteries due to its high ionic conductivity. In this study, a two-dimensional LLTO nanosheet/graphene (LLTO/C) nanosheet composite has been designed as an electrode material for lithium-ion batteries (LIBs). LLTO/C not only exhibits the ionic conductivity properties of perovskite-type LLTO, but the graphene between the layers of LLTO nanosheets also endows the material with additional electronic conductivity. Moreover, LLTO@C-600 exhibits an excellent rate capability as the electrode for delithiation with a high specific capacity of 350 mA h g−1 at 20 mA g−1, and 70% of the specific capacity can be maintained at 1.0 A g−1 after 800 cycles. The excellent electrochemical performances can be attributed to the superior interficial capacitive Li+ storage capability.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Cheng Chen,Yan-Hua Liu,Ming Zhu,Shi-Qing Zhao,Wen-Wen Xu,Linsen Chen,Wenbin Huang
Electrochromic devices are emerging as a futuristic technology for flexible electronics with the practical application values in energy-saving, displaying and military camouflage, however, the limitations in the optical, electrical and mechanical properties of the existing transparent conducting electrodes (TCEs) appear as a major obstacle for realizing high performance flexible electrochromic devices. In this work, we have proposed and demonstrated a fast-response and bendable polymer poly (3,4-ethylenedioxythiophene):poly (styrenesulfonate) (PEDOT: PSS) electrochromic device based on the embedded nickel (Ni) grid electrode. The Ni grid electrode, fabricated though patterned electroplating, has low sheet resistance (~1.3 Ω/sq), high transparency (~80%), excellent mechanical reliability and long-term chemical stability, exhibiting a figure of merit of 1250, surpassing the most existing TCEs. In addition, we have proposed a compact electrochromic architecture with the electrochromic PEDOT: PSS layer and solid polymer electrolyte being sandwiched between two embedded Ni grid electrodes. The device shows a short coloration and bleaching time (~1 s for 90% optical contrast), a high coloration efficiency (325 cm 2 /C) and excellent mechanical reliability (optical contrast retention ~80% after 1000 bending circles), paving a way for high performance flexible electronics.
研究领域:
材料科学
·
电子工程
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）