Advanced Energy Materials
·
2022
·Vol. 12
·期 20
·2200813
·
IF 29.698
Weiyuan Huang,Qi Zhao,Mingjian Zhang,Shenyang Xu,Haoyu Xue,Chen Zhu,Jianjun Fang,Wenguang Zhao,Guoxi Ren,Runzhi Qin,Qinghe Zhao,Haibiao Chen,Feng Pan
LiCoO 2 (LCO) is the most successful cathode material for commercial lithium-ion batteries. Cycling LCO to high potentials up to 4.5 V or even 4.6 V can significantly elevate the capacity but cause structural degradation due to the serious surface side reaction between the highly oxidized Co 4+ and O − species with organic electrolytes. To tackle this concern, a new strategy, constructing cation and anion dual gradients at the surface of LCO (DG-LCO), is proposed. Specifically, the electrochemically inactive cation and anion are selected to substitute Co 3+ and O 2− at the surface in a gradated manner, thus minimizing the highly oxidized Co 4+ and O − species at high potentials and suppressing the induced surface side reactions. Unexpectedly, this dual gradient design leads to a spinel-like surface structure coherently with bulk layered structure, which facilitates Li + diffusion kinetics. Thus, DG-LCO achieves high capacity and excellent cycling stability at 4.6 V (≈216 mA h g −1 at 0.1 C, a capacity retention of 88.6% after 100 cycles in 1.8 A h pouch full cell at 1 C), as well as improved rate capability (≈140 mA h g −1 at 5 C). These studies provide useful guidelines for future design of cathode materials with long lifespan and high rate capability.
研究领域:
材料科学
·
电化学
·
储能
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Qi Huang,Yadong Jiang,Zaihua Duan,Yuanming Wu,Zhen Yuan,Mingxiang Zhang,Huiling Tai
Various self-powered flexible pressure sensors (including piezoelectric, triboelectric and electrochemical types) have attracted great attentions and made significant progresses, but they also have some shortcomings, such as the inability to detect static pressure (piezoelectric and triboelectric types) and performance degradation (electrochemical type). Inspired by the ion gradient power generation mechanism, we propose a self-powered flexible pressure sensor based on pressure regulated ion gradient coupled with piezoresistive effect. The proposed pressure sensor is mainly composed of high humidity region (LiCl-filter paper (FP)) and low humidity region (carbon nanotubes-FP). The results show that the sensor can directly output current signal with a wide pressure range (0.1–100 kPa). Based on the output voltage and current signals and the morphology characterization, the power generation and pressure sensing mechanisms of the sensor are clarified using the ion gradient and piezoresistive effects. In addition, the sensor can be used to identify different respiratory states in combination with machine learning. This work provides a new strategy for constructing self-powered pressure sensor based on pressure regulated ion gradient strategy coupled with piezoresistive effect.
研究领域:
材料科学
·
生物医学工程
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Junyao Wang,Yuyang Huang,Guangze Gao,Huan Liu,Yuhan Huang,Taipeng Wang,Zhida Li,Jianlang Shu,Tinggang Zhang
Inspired by the electric eel, biomimetic, biocompatible energy storage, and power generation technologies show promise for applications in portable and wearable electronic devices by mimicking the electric cell tandem structure of the electric eel and utilizing ionic gradients between hydrogel compartments to generate electricity. Previously, inspired by the unique morphology of the torpedo fish, an artificial flexible power source that can output a large current was introduced. This power source uses a hydrogel-infused paper hybrid to create, accordionize, and reconfigure arbitrary-sized gel films in series and parallel, and the power output of the flexible battery was significantly enhanced. However, maintaining the ionic gradient of hydrogel batteries during storage remains a challenge. Here, by borrowing the isolation properties of the accordion structure, we propose a unique paper accordion structure design to fabricate an Accordion-Structured Hydrogel Battery (ASHB). Pretreatment of hydrogel-injected paper strips improved storage stability and maintained the ionic gradient of hydrogel cells in the nonworking state, so that the cell’s gradient retention time after the assembly is completed is increased by at least 30 h compared to stacking, and its per-cell operating voltage is still able to reach. The design also makes the assembly and use of flexible batteries more modular and holistic. In the future, it may be possible to power the cells with ions generated by the human body or the metabolites of living organisms, leading to the development of more efficient, sustainable, and eco-friendly power solutions.
研究领域:
生物工程
·
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Nano Energy
·
2024
·
IF 16.8
Qi Huang,Yadong Jiang,Zaihua Duan,Yuanming Wu,Zhen Yuan,Jinhong Guo,Mingxiang Zhang,Huiling Tai
To cope with energy hazards and reduce frequent battery replacement of strain sensors, various self-powered flexible strain sensors (including piezoelectric , triboelectric and electrochemical types) have developed recent years. However, the piezoelectric and triboelectric strain sensors cannot monitor static strain, and electrochemical strain sensors face the problem of performance degradation . Herein, inspired by ion gradient generators, a self-powered flexible strain sensor based on strain regulated ion gradient strategy is constructed. The sensor consists of elastic yarn coated with carbon nanotubes (CNTs), LiCl-filter paper (FP) and latex tube encapsulation. LiCl-FP with excellent water molecules absorption performance is wrapped on one side of the elastic yarn, forming a high humidity region in the sensor. The part of the elastic yarn that is not covered by LiCl-FP has weak water molecules absorption performance, forming a low humidity region in the sensor. The ions in the sensor move directionally from the high humidity region to the low humidity region, forming an ion gradient and generating voltage/current. The test results indicate that the sensor exhibits a wide strain detection range (0.5%–100%) and good repeatability (1000 times). The strain sensing mechanism can be attributed to the strain regulated ion gradient and the resistance strain effect. In addition, the strain sensing function of the sensor is verified by monitoring respiration. This work opens a new avenue for development of self-powered strain sensor using strain regulated ion gradient.
研究领域:
材料科学
·
生物医学工程
·
传感技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Nano Materials
·
2022
·
IF 6.14
Mengyao Li,Jingyu Wang,Hongxia Cao,Xing Zhao,Yuchun Zhang,Yong Yan
Controlling and directing colloidal micro/nanoparticle assembly using external forces is essential to developing modern electro-optical devices. Here we show that the concentration gradients of metal ions produced by chemical/electrochemical corrosion could drive the motion of colloidal microspheres under the assistance of a well-known osmotic force. This force is programmable in both direction and strength which enables us to guide the moving directions of microspheres at controlled rates. To demonstrate the utility of this force in producing ordered assemblies, dynamic colloidal “crystals” built with one and/or two types of microspheres that replicate the electrode templating patterns are created. In addition, the motion of particles and their dynamic assembly are reproduced by a simulation combining Poisson–Nernst–Planck and Navier–Stokes equations. We believe this method opens the door to the development of complex patterns (e.g., differing in pattern shapes, homo- and/or heterojunctions with two or multiple components) self-assembled by colloidal particles and functional materials with electro-optical properties.
研究领域:
材料科学
·
物理化学
·
纳米技术
✓ 已验证
DOI
高影响因子
Journal of the American Chemical Society
·
2024
·
IF 14.4
Weipeng Chen,Suli Zhang,Ao Zhang,Huirong Liu,Zhixin Wu,Linxin Zhai,Xiaomin Dong,Zhiping Xu,Ziguang Zhao,Liping Wen
Piezoionic materials have attracted considerable attention for their ability to generate iontronic signals or power in response to stress stimuli. However, the limited intrinsic transport distinction between cations and anions within most ionic materials results in weakened iontronic power conversion efficiencies under stress fields. Here, we report a piezoheterogated biphasic gel for ultrahigh iontronic generation, characterized by high-internal microphase heterointerfaces that facilitate the distinct transport of various ion species. Due to the ion confinement effect of cell-like multicompartments, a stable intercellular ion gradient within biphasic gel systems can be established in situ, constructing the chemical potential to further enhance ionic transmission efficiency and obtain a high-density net ion flux in the piezoionic process. Consequently, as a reliable piezo cell, a record maximum power of 150 W/m3 over 24 h can be realized. Meanwhile, we develop piezoionic devices that can interface with paralyzed vagus nerves and successfully regulate the blood pressure of rodents through their neuromodulation. By matching the ion species with heterointerface gating effects to regulate the ionic transmission efficiency, the piezo signal neuromodulation process can be further governed. We anticipate that the bioinspired heterointerface engineering strategy can provide new insights into designing high-performance piezoionic systems for promising abiotic–biotic applications.
研究领域:
材料科学
·
生物医学工程
·
神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2025
·
IF 19
Zhaoyang Sun,Xian Wen,Jiseok Kim,Kaiying Zhao,Qun Zhou,Manmatha Mahato,Van Hiep Nguyen,Yang Yang,Liming Wang,Il-Kwon Oh
The hydrogel-based power source represents a compelling example of generating electricity from green energy. Recent advances have introduced various hydrogel-based electric generators that operate through external stimuli or utilize ionic interfacial regulation. However, most devices still encounter significant challenges, such as the requirement for continuous stimulation, limited output performance, complex integration processes, and poor conformability of conventional designs, hindering their practical application in wearable electronics. Here, a hydrogel-based power source is proposed that produces electricity by exploiting moisture-induced ion gradients and differential ion absorption driven by charge-asymmetric electrodes. The constructed device with flexible structure can generate a continuous voltage output of 0.45 V for 4 000 min and a current output of 12.3 µA cm −2 along with a power density up to 7.7 W m −3 for a single unit. The flexibility of the device allows it to conform to be attached to various surfaces, thus allowing the overall flexibility and folding into a small scale during the integrated process. Benefit from the miniaturized design, with a palm-sized folding integrated device containing sixteen devices that can directly power a calculator. This work provides a brand-new blueprint for a hydrogel-based energy harvester suitable for flexible electronics.
研究领域:
材料科学
·
能量收集
·
柔性电子
·
水凝胶技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL PHYSICS LETTERS
·
2025
·
IF 3.1
Ruifeng Wang,Jiabao Bai,Zhengtao Qiu,Yelin Ding,Chun Sun
Hydrogen peroxide (H 2 O 2 ) is a versatile green oxidant with wide-ranging applications. In this study, a bismuth ion (Bi 3+ )-gradient-doped indium sulfide (In 2 S 3 ) photocatalyst with abundant sulfur vacancies (V s ) was successfully prepared via a polyvinylpyrrolidone (PVP)-assisted hydrothermal method combined with solid-state grinding. The synergy of Bi 3+ doping and V s narrows the bandgap and constructs a built-in electric field for directional carrier transport, enabling the catalyst to achieve a H 2 O 2 production rate of 784.35 μmol g −1 h −1 under visible light (λ ≥ 420 nm). This work establishes a novel paradigm for designing high-performance sulfide photocatalysts.
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2025
·
IF 26.8
Ruizeng Luo,Yijie Fan,Yilin Qi,Yuan Bai,Meng Xiao,Yujia Lv,Jinrui Liang,Mingcheng Tang,Jiaping Zhang,Zhou Li,Dan Luo
Endogenous electric field (EF) originating from differences in ionic gradients plays a decisive role in the wound healing process. Based on this understanding, a self-manipulating sodium ion gradient-based endogenic electrical stimulation dressing (smig-EESD) is developed to achieve passive, non-invasive, endogenic electrical stimulation of wounds, which avoids the side effects of electrode occupancy, electrochemical reactions, and thermal effects present in traditional exogenous electrical stimulation. smig-EESD reduced the potential at the center of the wound by specifically absorbing Na+ in the exudate, ultimately strengthening the wound endogenous EF. Importantly, smig-EESD converted the active transport dependent on Na + /K + -ATPase into passive diffusion by adsorbing extracellular matrix Na+, and the saved ATP consumption promoted tissue repair process. smig-EESD regulated innate and adaptive immune responses by upregulating the secretion of multiple cytokines, thereby suppressing injury-associated inflammatory responses and reducing scar formation. smig-EESD reveals an endogenic electrical stimulation strategy that is independent of electrodes and circuits, and provides new insights into the future development of electronic medicine.
研究领域:
生物医学工程
·
伤口愈合
·
组织工程
·
电疗法
·
免疫学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Bioactive Materials
·
2022
·
IF 16.874
Changhao Li,Cairong Xiao,Lizhen Zhan,Zhekun Zhang,Jun Xing,Jinxia Zhai,Zhengnan Zhou,Guoxin Tan,Jinhua Piao,Yahong Zhou,Suijian Qi,Zhengao Wang,Peng Yu,Chengyun Ning
Pathological angiogenesis frequently occurs in tumor tissue, limiting the efficiency of chemotherapeutic drug delivery and accelerating tumor progression. However, traditional vascular normalization strategies are not fully effective and limited by the development of resistance. Herein, inspired by the intervention of endogenous bioelectricity in vessel formation, we propose a wireless electrical stimulation therapeutic strategy, capable of breaking bioelectric homeostasis within cells, to achieve tumor vascular normalization. Polarized barium titanate nanoparticles with high mechano-electrical conversion performance were developed, which could generate pulsed open-circuit voltage under low-intensity pulsed ultrasound. We demonstrated that wireless electrical stimulation significantly inhibited endothelial cell migration and differentiation in vitro . Interestingly, we found that the angiogenesis-related eNOS/NO pathway was inhibited, which could be attributed to the destruction of the intracellular calcium ion gradient by wireless electrical stimulation. In vivo tumor-bearing mouse model indicated that wireless electrical stimulation normalized tumor vasculature by optimizing vascular structure, enhancing blood perfusion, reducing vascular leakage, and restoring local oxygenation. Ultimately, the anti-tumor efficacy of combination treatment was 1.8 times that of the single chemotherapeutic drug doxorubicin group. This work provides a wireless electrical stimulation strategy based on the mechano-electrical conversion performance of piezoelectric nanoparticles, which is expected to achieve safe and effective clinical adjuvant treatment of malignant tumors.
研究领域:
生物医学工程
·
肿瘤学
·
纳米技术
·
超声治疗
·
血管生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）