JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Yulei Wang,Ruotong Li,Bin Feng,Tao Long,Kairong Wang,Qinqin Yu,Zuyong Wang,Yuan-Li Ding
Fast charging and all-climate electrochemical behaviors are two of the most important issues of olivine cathodes for lithium ion batteries (LIBs) owing to inferior Li + and electron conduction at a high current density or low temperature. Taking Mn-containing olivine cathode (LiFe 0.8 Mn 0.2 PO 4 , LFMP) as an example, herein, we report a facile interconnected, hierarchically porous and highly conductive framework design strategy to construct an advanced bulk LFMP@graphene hybrid, realizing superior fast charging capability and wide temperature performance (−20∼80 °C). Such hybrids not only offer well-interconnected and highly conductive graphene networks, but also possess hierarchical porous interiors where the former ensures high-efficiency charge transfer between active components while the latter facilitates Li + diffusion. Benefiting from these advantages, the obtained hybrids deliver superior rate capability (85.0 mAh g −1 up to 20C) and high capacity retentions of 94.1 % after 3000 cycles at 10C (50 °C), and 91.7 % after 500 cycles at 5C (80 °C), and 93.6 % after 1300 cycles at 1C (−20 °C). This work provides an efficient strategy to design practical olivine cathode at the material level for fast charging and all-climate LIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
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2018
·
IF 3.886
Lihong Yu,Feng Lin,Lin Xu,Jingyu Xi
A phosphorous-doped graphite felt (PGF) is fabricated and examined as electrode for vanadium flow battery (VFB). P doping improves the electrolyte wettability of GF and induces more defect sites on its surface, resulting in significantly enhanced activity and reversibility towards VO 2+ /VO 2 + and V 2+ /V 3+ couples. VFB with PGF electrode demonstrates outstanding performance such as high-rate capability under 50–400 mA cm −2 , wide-temperature tolerance at −20 °C–60 °C, and excellent durability over 1000 charge–discharge cycles. These merits enable PGF a promising electrode for the next-generation VFB, which can operate at high-power and all-climate conditions.
研究领域:
能源化学
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材料科学
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电化学
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储能技术
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2021
·
IF 17.789
Zhong Fang,Yang Yang,Tianle Zheng,Nan Wang,Congxiao Wang,Xiaoli Dong,Yonggang Wang,Yongyao Xia
High-energy-density CF x /Li batteries have attracted wide applications, but encountered poor environmental adaptability at high/low temperatures. Guided with unique electrolyte-involved reaction mechanism, propylene carbonate (PC)/methyl butyrate (MB) co-solvent formulation was optimized to tune the desolvation barrier and stability for wide temperature operation. Weak affinity of Li + -MB and unique solvation structure of electrolyte, which facilitated easy desolvation at both high rate and low temperature, were uncovered with theoretical calculations and spectra characterizations. Desolvation process from intermediate and percolation-type reaction were clearly revealed with in-situ FT-IR and ex-situ TEM. The synergistic effect of handy desolvation with fast kinetics at the interface enabled excellent rate performance (1C, 834 mAh g −1 ) at +25°C and high capacity (240 mAh g −1 ) at low temperature of -70°C. Simultaneously, the stability of electrolyte assisted to realize high-temperature tolerance up to +95°C. The mechanism-guided electrolyte design offers deep understanding and novel strategy to improve CF x /Li batteries for wide temperature applications.
研究领域:
材料科学
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电化学
✓ 已验证
产品关联
DOI
高影响因子
Energy Storage Materials
·
2020
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IF 16.28
Cheng Ma,Yiming Feng,Xuejun Liu,Ying Yang,Liangjun Zhou,Libao Chen,Chenglin Yan,Weifeng Wei
Lithium-sulfur (Li-S) batteries are considered as a promising candidate of next generation lithium batteries by virtue of high theoretical energy density , low cost and eco-friendliness, yet their commercialization still suffers from undesirable polysulfide shuttling and uncontrollable Li dendrites growth. Herein, a dual-engineered separator is designed through double-side construction of ammonium alcohol polyvinyl phosphate/carbon black (AAPP/CB) constituted “polysulfide stockroom” and Li 1.5 Al 0.5 Ge 1.5 (PO 4 ) 3 (LAGP) based “ion guider” on a commercial polypropylene (PP) substrate. Such functional separator AAPP/CB@PP@LAGP enables highly robust, all-climate Li-S batteries, which is attributed to the efficient polysulfide-absorption/conversion function of the AAPP/CB layer and uniform Li ion distribution/transport capacity induced by the LAGP layer. It is anticipated that this work may provide a promising strategy for interface engineering of separators and promote the wide-temperature application of Li-S batteries.
研究领域:
材料科学
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能源存储技术
✓ 已验证
DOI
高影响因子
Energy & Environmental Materials
·
2022
·Vol. 6
·期 2
·e12357
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IF 13.443
Yuqi Jiang,Kun Ma,Meiling Sun,Yuanyuan Li,Jinping Liu
Hybrid supercapacitors have shown great potentials to fulfill the demand of future diverse applications such as electric vehicles and portable/wearable electronics. In particular, aqueous zinc-ion hybrid supercapacitors (ZHSCs) have gained much attention due to their low-cost, high energy density, and environmental friendliness. Nevertheless, typical ZHSCs use Zn metal anode and normal liquid electrolyte, causing the dendrite issue, restricted working temperature, and inferior device flexibility. Herein, a novel flexible Zn-ion hybrid supercapacitor (FZHSC) is developed by using activated carbon (AC) anode, δ-MnO 2 cathode, and innovative PVA-based gel electrolyte. In this design, heavy Zn anode and its dendrite issue are avoided and layered cathode with large interlayer spacing is employed. In addition, flexible electrodes are prepared and integrated with an anti-freezing, stretchable, and compressible hydrogel electrolyte, which is attained by simultaneously using glycerol additive and freezing/thawing technique to regulate the hydrogen bond and microstructure. The resulting FZHSC exhibits good rate capability, high energy density (47.86 Wh kg −1 ; 3.94 mWh cm −3 ), high power density (5.81 kW kg −1 ; 480 mW cm −3 ), and excellent cycling stability (~91% capacity retention after 30 000 cycles). Furthermore, our FZHSC demonstrates outstanding flexibility with capacitance almost unchanged even after various continuous shape deformations. The hydrogel electrolyte still maintains high ionic conductivity at ultralow temperatures (≤−30°C), enabling the FZHSC cycled well, and powering electronic timer robustly within an all-climate temperature range of −30~80°C. This work highlights that the promising Zn metal-free aqueous ZHSCs can be designed with great multifunctionality for more practical application scenarios.
研究领域:
材料科学
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能源存储
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环境工程
✓ 已验证
产品关联
DOI
高影响因子
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
·
2024
·
IF 3.8
Shicheng Cao,Chengzhi Hu,Guoxian Wang,Kai Wang,Zhangxian Chen,Zeheng Yang,Weixin Zhang
Hydrated vanadate possesses a large layer distance and rich vanadium redox center superior for flexible electrochromic devices (FECDs). However, the low mechanical strength and high interfacial impedance caused by the low processing temperature pose key challenges. This study presents the successful development of an all-climate solid-state FECD using a hydrate vanadate/MXene composite and hydrogel electrolyte. The integration of high-crystallinity, layer-structured V2O5·1.6H2O with two-dimensional MXene nanoflakes facilitates fast ion transfer, enabling excellent electrochromic properties with fast responses (Coloring time = 5.8 s; Bleaching time = 9.8 s), large optical modulation (64.02%), coloring efficiency, and high flexibility. The hydrogel electrolyte provides strong mechanical strength and a wide operating temperature range between −10 and 55 °C. This work signifies a critical step toward the application of FECDs in smart windows, offering a promising solution for environments requiring high flexibility and climate resilience.
研究领域:
材料科学
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能源技术
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电子工程
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Yu Lin,Jing Huang,Sijun Wang,Luhe Qi,Weimin Chen,Le Yu,Chaoji Chen
Aqueous zinc-ion batteries (AZIBs) are promising candidates for next-generation energy storage due to their intrinsic safety and environmental compatibility. However, parasitic reactions induced by active water molecules in conventional aqueous electrolytes severely degrade electrochemical performance and cycling stability. Herein, a stretchable, adhesive, anti-freezing hydrogel electrolyte with dual-functional water regulation is synthesized via a one-pot radical polymerization strategy, where acetate (Ac − ) anions and hydrophilic amide (─CONH 2 ) groups on polyacrylamide (PAM) chains synergistically regulate water activity. This design disrupts water's intrinsic hydrogen bond network and suppresses interfacial side reactions, enabling stable AZIBs operation across a wide temperature range (−20 to 100 °C). Consequently, Zn||Cu cells employing PAM-Zn(Ac) 2 -4KAc (denoted PAM-ZnK4Ac) hydrogel electrolyte achieve an average Coulombic efficiency of 99.7% over 500 cycles, demonstrating outstanding reversibility. Meanwhile, Zn||polyaniline (PANI) cells retain 81.4% capacity after 1100 cycles at −20 °C and operate effectively up to 100 °C. This work establishes a facile yet effective strategy for preparing hydrogel electrolytes, advancing all-climate AZIBs toward extreme-environment energy storage and flexible electronics.
研究领域:
电化学储能
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材料科学
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高分子化学
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能源材料
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柔性电子
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环境适应性材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Sustainable Chemistry & Engineering
·
2024
·
IF 7.1
Yang Jiang,Wenhui Li,Kun Luo
P2-type layered oxide materials have attracted considerable interest because of their high safety and low cost. However, P2-type materials suffer from complicated Na+/vacancy ordering and undesirable phase transitions, resulting in staircase-like electrochemical curves accompanied by fast capacity fading and poor rate performance. A P2-type layered cathode material with high-entropy cation configurations, Na0.85Li0.08Mg0.04Ni0.22Al(B)0.04Mn0.62O2 (HEO), is designed and successfully synthesized in this work. The presence of various metal ions in the transition metal layers imposes an influence on the Na+/vacancy arrangement in the alkali layers, as evidenced by the change of the interlayer distance associated with the electrostatic repulsion. HEO exhibits a smooth electrochemical process without obvious voltage plateaus within 2.0–4.3 V and delivers a reversible capacity of 115 mA h g–1. Structural characterizations indicate that HEO undergoes a complete solid–solution reaction without undesirable phase transitions over the whole voltage range, which facilitates ultrasmall volume variation (0.6%) and fast Na+ ion diffusion (10–9 cm2 s–1) in the electrochemical process. The HEO material therefore shows excellent electrochemical performances with high rate performance (91 mA h g–1 at a current density of 480 mA g–1) and high capacity retention in a wide temperature range from −45 to 55 °C (after 100 cycles, the batteries show 80% capacity retention at 55 °C, 87% at room temperature, and 92% at −45 °C). The results described in this work demonstrate a method to inhibit the complicated staircase-like electrochemical profiles induced by either Na+/vacancy ordering or undesirable P–O phase transitions in P2-type oxide cathode materials and a useful strategy for enhancing the electrochemical performance of P2-type cathode materials for all-climate sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
电池技术
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 21
·2201038
·
IF 19.924
Wen-Hao Li,Yue-Ming Li,Xin-Fang Liu,Zhen-Yi Gu,Hao-Jie Liang,Xin-Xin Zhao,Jin-Zhi Guo,Xing-Long Wu
Dual-ion batteries (DIBs) are a viable option for large-scale energy storage owing to their high energy density, low cost, and environmental friendliness. However, interfacial instability at both the cathode and anode in Li-graphite DIBs (LG-DIBs) contributes to poor cycling performance and failed energy storage, severely limiting their application potentials. Herein, a two-pronged strategy is used to improve the interfacial stability, synergistically stabilizing the graphite cathode by applying a rigid/inert surface coating while building a 3D framework on the lithium anode. The resultant LG-DIBs are ultrastable and achieve a long cycle life (capacity retention of 80% after 2700 cycles at 200 mA −1 ) in the all-climate temperature range from −25 to 40 °C. Ex situ characterization reveals that the cathode–electrolyte interphase on graphite is stabilized by suppressing the electrolyte decomposition and reducing graphite exfoliation. Simultaneously, the framework constructed on the lithium anode induces uniform and dendrite-free Li deposition owing to its 3D structure. This study not only contributes to the development of practical LG-DIBs but also points out a promising research direction for other new types of batteries.
研究领域:
储能
·
电化学
·
材料科学
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）