ACS Nano
·
2024
·
IF 15.8
Minxia Jiang,Minxi Li,Chang Cui,Jie Wang,Yang Cheng,Yixin Wang,Xing Zhang,Jinwen Qin,Minhua Cao
Ti3C2Tx MXene often suffers from poor lithium storage behaviors due to its electrochemically unfavorable OH terminations. Herein, we propose molecular-level interfacial chemistry regulation of Ti3C2Tx MXene with phytic acid (PA) to directly activate its OH terminations. Through constructing hydrogen bonds (H-bonds) between oxygen atoms of PA and OH terminations on Ti3C2Tx surface, interfacial charge distribution of Ti3C2Tx has been effectively regulated, thereby enabling sufficient ion-storage sites and expediting ion transport kinetics for high-performance energy storage. The results show that Li ions preferably bind to H-bond acceptors (oxygen atoms from PA), and the flexibility of H-bonds therefore renders their interactions with adsorbed Li ions chemically “tunable”, thus alleviating undesirable localized geometric changes of the OH terminations. Meanwhile the H-bond-induced microscopic dipoles can act as directional Li-ion pumps to expedite ion diffusion kinetics with lower energy barrier. As a result, the as-designed Ti3C2Tx/PA achieves a 2.4-fold capacity enhancement compared with pristine Ti3C2Tx (even beyond theoretical capacity), superior long-term cyclability (220.0 mAh g–1 after 2000 cycles at 2.0 A g–1), and broad temperature adaptability (−20 to 50 °C). This work offers a promising interface engineering strategy to regulate microenvironments of inherent terminations for breaking through the energy storage performance of MXenes.
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DOI
高影响因子
ELECTROCHIMICA ACTA
·
2020
·
IF 6.215
Chenguang Liu,Yinchao Zhao,Ruowei Yi,Hao Wu,Wenbin Yang,Yinqing Li,Ivona Mitrovic,Stephen Taylor,Paul Chalker,Rui Liu,Li Yang,Cezhou Zhao
Here, we demonstrate a facile method to synthesize an amorphous GeO x -coated MXene nanosheet structure as the anode in lithium-ion batteries. By using the GeO 3 2− as the precursor, NaBH 4 as the reduction agent, we performed a one-pot in situ synthesis to prepare a composite of GeO x nanoparticles coated on MXene nanosheet. The size of the GeO x nanoparticles is approximately 50 nm, which offers abundant contact surface between active materials with the electrolyte, as well as fast pathways for Li-ion interaction. Moreover, the unique two-dimensional MXene nanosheet serves as the excellent conductive additives to improve the electrochemical stability and electrical conductivity of composite when used in LIBs. The results indicate that the GeO x /MXene nanosheet structure significantly improves the stability during the lithiation/delithiation processes, with the enhanced capacity through an improved kinetic process. Another attractive element of this novel anode is the flexibility to tune the electrochemical properties by using different combination of binder and solvent when the slurry is prepared for the electrode fabrication. The electrode prepared with polyvinylidene fluoride binder and N-methyl pyrrolidinone solvent exhibits an excellent sustainable capacity of 381 mAh g −1 at 15 A g −1 . By contrast, the electrode with lithium polyacrylate and de-ionized water delivers a reversible capacity of 950 mAh g −1 at 0.5 A g −1 after 100 cycles. These interesting results are ascribed to the inner characteristic structure of the two types of electrodes, which have been verified by electrochemical kinetics and scanning electron microscopic images. It also reveals that the different dispersion state is responsible to the difference of electrochemical properties, which highlights the importance of the electrode design for high-performance lithium-ion batteries.
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DOI
高影响因子
iScience
·
2022
·
IF 6.107
Bin Xia,Zhe Wang,Tingting Wang,Shuaishuai Chen,Han Wu,Binbin Zhang,Yunfa Si,Zibo Chen,Bao-Wen Li,Zongkui Kou,Daping He
Summary Numerous voids among the incompact layer-structure of MXene films result in their low ambient stability and poor innate conductivity for electromagnetic interference (EMI) shielding. Herein, we report a bridging-sheet-size-controlled densification process of MXene films by applying graphene oxide (GO) as a bridging agent. Specifically, the sheet size of GO is tailored to quantify a negative correlation of sheet size with densification for directing the preparation of most compact MXene-GO films. Benefiting from the shortest electron-transport-distance in the most compact structure, the conductivity of the MXene-GO film achieves 1.7 times (∼1.6 × 10 5 S/m) that of MXene film. The EMI shielding performance (5.2 × 10 6 dB/m) reaches the record-value among reported MXene films at 10 μm-scale thickness. Moreover, the compact structure boosts the ambient stability of MXene-GO films where the conductivity and EMI shielding performance remain 88.7% and 90.0% after 15 days, respectively. The findings rationale the structure-activity relationship of compact MXene films for flexible electronics.
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2020
·
IF 3.83
Jinfeng Yan,Yanan Ma,Xingxing Li,Chuankun Zhang,Minglei Cao,Wei Chen,Shijun Luo,Meng Zhu,Yihua Gao
Due to the portability, good flexibility and excellent sensing performance, flexible piezoresistive sensors have received great attention in the field of transient electronic skin, intelligent robots and human-machine interaction. However, achieving both high sensitivity and wide sensing range by low-cost and large-scale method still remains a key challenge for developing high performance piezoresistive sensors. Here, a flexible and highly sensitive piezoresistive sensor was designed and realized by combining the 2D MXene material with wrinkle structure. The MXene composite based sensor with wrinkle structure was fabricated by spraying the active material onto the surface of a pre-stretched polyacrylate tape, which is facile, efficient and low-cost. The MXene composite based sensor demonstrates high sensitivity (148.26 kPa −1 ), wide pressure range (up to 16 kPa), short response time (120 ms) and excellent durability (>13000 cycles). Moreover, benefiting from the extraordinary sensing performance and flexibility, the sensor can detect human physiological signals, monitor intelligent robot postures and map spatial pressure distributions, thus exhibiting great potential in physiological analysis systems, humanoid robotics and biomedical prostheses.
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高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jianjian Zhong,Zhen Wang,Jianling Li
Two-dimensional titanium carbide (Ti3C2Tx) is a promising lithium storage anode material owing to high conductivity and larger redox sites. However, Ti3C2Tx exhibits lower specific capacitance in an organic system due to the passivation effect of surface terminals and also suffers from restacking issues with long-term cycles. Herein, the material composed of a molybdenum–phosphorus compound and Ti3C2Tx nanosheets is reported through thermal decomposition of polyoxometalate. The derived molybdenum phosphide provides greater free space to afford the volume change and facilitate lithium-ion transport. The unique diphosphorus centers are favorable to improving lithium storage capacity and electrochemical reaction. In addition, molybdenum oxide with abundant oxygen vacancies not only accelerates the electronic and ionic conductivity but also provides more active sites. The optimized 0.1PMA@Ti3C2Tx composite delivers a superior specific capacity of over 500 mAh g–1 at 30 mA g–1 and maintains the specific capacity of 155.6 mAh g–1 at 750 mA g–1 after 400 cycles. The lithium-ion capacitor based on the 0.1PMA@Ti3C2Tx anode material presents a wonderful energy density of 153.95 Wh kg–1 at a higher power density of 4696.8 W kg–1. This work provides a strategy for high-capacity lithium storage of MXene materials and opens up an idea for the application of polyoxometalates in lithium storage.
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DOI
高影响因子
ACS Applied Energy Materials
·
2022
·
IF 6.959
Bowen Fu,Han Man,Jie Zhao,Fei Wang,Fang Fang,Dalin Sun,Yun Song
In all-solid-state batteries, the traditional electrode is assembled with active electrode materials, electronic conductors, and solid electrolytes. This multiple-phase structure with solid–solid contact leads to complicated interface degradations, such as electrolyte decomposition and derived mass/charge transfer obstacle. To ameliorate above issues, the less electrode components are employed, the less interface issue will emerge. Herein, such a conception is implemented by MXene, which not only provides the dual ionic–electronic transport network but also acts as a buffer layer for alleviating volume changes and homogenizing the electric field. The practicability and universality of this multifunctional MXene strategy are verified in intercalation and alloy type anodes, as well as sulfur and selenium cathodes. More excitingly, a thick electrode (∼100 μm) with a high mass loading (16.7 mg cm–2) can even be realized in a germanium/MXene electrode without obvious capacity decay upon cycling. Less MXene turns complexity into simplicity and eventually shows fascinating electrochemical performance in all-solid-state batteries.
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DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Qibin Luan,Yongli Xie,Da Teng,Runlin Han,Shouhai Zhang
Inorganic nanosheets materials are attracting more and more attention to prepare mixed matrix membrane (MMM) with excellent performance. MXene, a new kind of 2D transition metal carbides material, has the similar lamellar structure as graphene oxide and it is a potential material of separation membrane. In this work, the typical MXene material named Ti 3 C 2 T x is used to prepare MXene/cellulose acetate (CA) MMM with phase inversion method. The scanning electronic microscopic images of the membrane show the dense functional layer without visible defects. The MXene/CA MMM prepared with 18% CA and 3% MXene shows high rejection to Gentian Violet (408 Da) 100% with flux of 4.2 L/m 2 h at 0.3 MPa. It also has high rejection to Na 2 SO 4 89.6% with flux of 4.8 L/m 2 h at 0.3 MPa. After crosslinking with 5% glutaraldehyde at 60°C, the MMM performance does not decline after immersion in 50% dimethylacetamide solution for 12 d, which means excellent solvent resistance of the membrane. Compared with CA membrane, MXene/CA MMM also has better fouling resistance.
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DOI
高影响因子
Chemistry-An Asian Journal
·
2019
·Vol. 15
·期 15
·2364-2370
·
IF 3.698
Guozhen Liu,Long Cheng,Guining Chen,Feng Liang,Gongping Liu,Wanqin Jin
Mixed matrix membranes (MMMs) made from inorganic fillers and polymers is a kind of promising candidate for gas separation. In this work, two-dimensional MXene nanosheets were synthesized and incorporated into a polyether-polyamide block copolymer (Pebax) matrix to fabricate MMM for CO 2 capture. The physicochemical properties of MXene nanosheets and MXene/Pebax membranes were studied systematically. The introduction of MXene nanosheets provided additional molecular transport channels and meanwhile enhanced the CO 2 adsorption capacity, thereby enhancing both the CO 2 peremance and CO 2 /N 2 selectivity of Pebax membrane. The optimized MXene/Pebax membrane with a MXene loading of 0.15 wt % displayed a high separation performance with a CO 2 permeance of 21.6 GPU and a CO 2 /N 2 selectivity of 72.5, showing potential application in CO 2 capture.
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高影响因子
ELECTROCHEMISTRY COMMUNICATIONS
·
2018
·
IF 4.66
Qingmin Shan,Xinpeng Mu,Mohamed Alhabeb,Christopher E. Shuck,Di Pang,Xin Zhao,Xue-Feng Chu,Yingjin Wei,Fei Du,Gang Chen,Yury Gogotsi,Yu Gao,Yohan Dall'Agnese
Recently, a large family of 2D materials called MXenes have attracted much attention in the field of supercapacitors , thanks to the excellent performance demonstrated by Ti 3 C 2 MXene-based electrodes. However, research on MXenes for supercapacitor applications has been primarily focused on Ti 3 C 2 , even though there are more than 20 other members of this large family of materials already available. Studies on other MXenes are emerging, with promising results already achieved by Ti 2 C, Mo 2 C, and Mo 1.33 C in aqueous electrolytes. Yet, many other MXenes remain unexplored in aqueous supercapacitor applications. In this work, we report on the electrochemical behavior of a vanadium carbide MXene , V 2 C, in three aqueous electrolytes. Excellent specific capacitances were achieved, specifically 487 F/g in 1 M H 2 SO 4 , 225 F/g in 1 M MgSO 4 , and 184 F/g in 1 M KOH, which are higher than previously reported values for few micrometer-thick delaminated MXene electrodes. This work shows the promise of V 2 C MXene for energy storage using aqueous electrolytes.
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DOI
高影响因子
Nature Communications
·
2022
·Vol. 13
·期 1
·1-10
·
IF 17.694
Liu Na,Li Qiaoqiao,Wan Hujie,Chang Libo,Wang Hao,Fang Jianhua,Ding Tianpeng,Wen Qiye,Zhou Liujiang,Xiao Xu
Although Ti 3 C 2 T x MXene is a promising material for many applications such as catalysis, energy storage, electromagnetic interference shielding due to its metallic conductivity and high processability, it’s poor resistance to oxidation at high temperatures makes its application under harsh environments challenging. Here, we report an air-stable Ti 3 C 2 T x based composite with extracted bentonite (EB) nanosheets. In this case, oxygen molecules are shown to be preferentially adsorbed on EB. The saturated adsorption of oxygen on EB further inhibits more oxygen molecules to be adsorbed on the surface of Ti 3 C 2 T x due to the weakened p-d orbital hybridization between adsorbed O 2 and Ti 3 C 2 T x , which is induced by the Ti 3 C 2 T x /EB interface coupling. As a result, the composite is capable of tolerating high annealing temperatures (above 400 °C for several hours) both in air or humid environment, indicating highly improved antioxidation properties in harsh condition. The above finding is shown to be independent on the termination ratio of Ti 3 C 2 T x obtained through different synthesis routes. Utilized as terahertz shielding materials, the composite retains its shielding ability after high-temperature treatment even up to 600 °C, while pristine Ti 3 C 2 T x is completely oxidized with no terahertz shielding ability. Joule heating and thermal cycling performance are also demonstrated.
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DOI
PubMed
高影响因子
SENSORS
·
2025
·Vol. 25
·期 8
·2508
·
IF 3.5
Hanxue Yang,Chao Rong,Shundong Ge,Tao Wang,Bowei Zhang,Fu-Zhen Xuan
HighlightsWhat are the main findings?3D crumpled MXene with strain wrinkles enhances conductivity and prevents restacking.Cu nanoclusters (3.0 wt%) synergize N-doping for noble metal-like catalytic activity.What is the implication of the main finding?Ultrasensitive dual-analyte non-enzymatic detection of DA/UA with anti-interference capability and rapid response.Novel material design strategies provide new approaches for the development of future high-performance sensors.Simultaneous detection of dopamine (DA) and uric acid (UA) is essential for diagnosing neurological and metabolic diseases but hindered by overlapping electrochemical signals. We present an ultrasensitive electrochemical sensor using copper nanoclusters anchored on nitrogen-doped crumpled Ti3C2TxMXene (Cu-N/Ti3C2Tx). The engineered 3D crumpled architecture prevents MXene restacking, exposes active sites, and enhances ion transport, while Cu nanoclusters boost electrocatalytic activity via accelerated electron transfer. Structural analyses confirm uniform Cu dispersion (3.0 wt%), Ti-N bonding, and strain-induced wrinkles, synergistically improving conductivity. The sensor achieves exceptional sensitivity (1958.3 and 1152.7 μA·mM−1·cm−2for DA/UA), ultralow detection limits (0.058 and 0.099 μM for DA/UA), rapid response (<1.5 s), and interference resistance (e.g., ascorbic acid). Differential pulse voltammetry enables independent linear detection ranges (DA: 2–60 μM; UA: 5–100 μM) in biofluids, with 94.4% stability retention over 7 days. The designed sensor exhibits excellent capabilities for DA and UA detection. This work provides a novel design strategy for developing high-performance electrochemical sensors.
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产品关联
DOI
PubMed
高影响因子
BIOMACROMOLECULES
·
2025
·
IF 5.4
Shan Yu,Ling Wang,Mengdie Chen,Yanjun Chen,Zhenbo Peng
Myocardial infarction (MI) remains one of the leading causes of mortality worldwide, necessitating advanced therapeutic strategies to address the resulting electrical disconnection and pathological remodeling. This study developed a conductive hydrogel by covalently cross-linking silk fibroin and hyaluronic acid, integrating MXene nanosheets to mimic the extracellular matrix (ECM). Results demonstrated that the incorporation of MXene significantly enhanced the hydrogel’s conductivity, with SH-M5 exhibiting the highest conductivity of 0.32 S/m. The SH-M5 hydrogel effectively improved electrical signal transmission and enhanced the recovery of the left ventricular function in myocardial infarction. These findings underscore the transformative role of MXene in enhancing the functional properties of hydrogels for myocardial repair. The conductive hydrogel demonstrated a unique capacity to integrate mechanical reinforcement, electrical conductivity, and biocompatibility, presenting a promising platform for treating myocardial infarction and advancing regenerative medicine.
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产品关联
DOI
PubMed
高影响因子
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