Journal of Materials Chemistry A
·
2024
·Vol. 12
·期 48
·33958-33971
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IF 10.7
Danni Du,Qingyuan Liu,Jing Gao,Yuying Qin,Xiaobo Jiang,Yuanchang Shi,Minghao Hua,Xiaohang Lin,Zhiwei Zhang,Chengxiang Wang,Longwei Yin,Rutao Wang
Pre-potassiation technologies, which serve to provide additional potassium sources and/or mitigate potassium loss during cycling, are capable of enhancing the energy density and cycling life of potassium-ion capacitors (PICs) and potassium-ion batteries (PIBs). However, many reported pre-potassiation strategies involve using highly chemically reactive potassium sources, such as metallic potassium or K-containing additives, which increase both the cost and production risks. Herein, we propose a novel potassium-ion compensation strategy to meet the demand for high-performance potassium-ion full cells without using any high chemical reactivity potassium sources. This strategy is based on the foundation that a pre-lithiation carbon anode with a preformed solid-electrolyte-interphase (SEI) layer can effectively mitigate potassium loss without hindering the K+ diffusion from the electrolyte to the electrode during cell operation. PICs based on pre-lithiation carbon anodes, including soft carbon, hard carbon, and graphite, show better capacitive performance than those based on pre-potassiation carbon counterparts. This versatile strategy is also applicable to high-performance PIBs. We believe that this design principle, which incorporates mature pre-lithiation technologies into potassium-ion energy storage systems, has the potential to resolve some of the challenges with immature pre-potassium technologies.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2021
·
IF 6.707
Mengmeng Yang,Qingquan Kong,Wei Feng,Weitang Yao,Qingyuan Wang
Due to its relatively high theoretical capacity and low cost, transition metal oxides are considered as candidate anodes for potassium ion batteries (KIB). However, poor recyclability due to inherently large volume changes hinders their application. Therefore, we use Ganoderma spores as the carbon matrix to synthesize MoO 2 /N/C composites through simple complexation reactions. It was found that the synergistic effect of cage-like biomass carbon and molybdenum oxide can promote the transfer and adsorption of potassium ions, thereby improving the storage capacity of potassium ions. On the one hand, the introduction of a small amount of MoO 2 greatly enhances the potassium storage capacity of biomass carbon materials. On the other hand, the porous cage-like carbon structure effectively buffers the volume change during the MoO 2 potassium storage process and provides more diffusion paths for K + . In addition, the stable double-walled cage structure provides the possibility for the composite material to achieve good long-cycle performance. Specifically, MoO 2 /N/C composites provided a high reversible specific capacity of 422 mAh g −1 (after 200 cycles) at 200 mA g −1 , and coulombic efficiency was greater than 98%. The composites still provided a high capacity of 316 mAh g −1 after 500 cycles at 500 mA g −1 . At the same time, after 1500 cycles at 2000 mA g −1 , the capacity was maintained at 248 mAh g −1 . Verify the possibility of its practical application by assembling a full battery, meanwhile, through first-principles calculations, the reasons for the excellent potassium storage performance of MoO 2 /N/C electrodes are discussed.
研究领域:
材料科学
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电化学
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能源存储
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED MATERIALS
·
2020
·Vol. 32
·期 23
·1908027
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IF 27.398
Shuai Dong,Dandan Yu,Jie Yang,Li Jiang,Jiawei Wang,Liwei Cheng,Yan Zhou,Honglei Yue,Hua Wang,Lin Guo
Currently, exploring high-volumetric-capacity electrode materials that allow for reversible (de-)insertion of large-size K + ions remains challenging. Tellurium (Te) is a promising alternative electrode for storage of K + ions due to its high volumetric capacity, confirmed in lithium-/sodium-ion batteries, and the intrinsic good electronic conductivity. However, the charge storage capability and mechanism of Te in potassium-ion batteries (KIBs) have not been unveiled until now. Here, a novel K–Te battery is constructed, and the K + -ion storage mechanism of Te is revealed to be a two-electron conversion-type reaction of 2K + Te ↔ K 2 Te, resulting in a high theoretical volumetric capacity of 2619 mAh cm −3 . Consequently, the rationally fabricated tellurium/porous carbon electrodes deliver an ultrahigh reversible volumetric capacity of 2493.13 mAh cm −3 at 0.5 C (based on Te), a high-rate capacity of 783.13 mAh cm −3 at 15 C, and superior long-term cycling stability for 1000 cycles at 5 C. This excellent electrochemical performance proves the feasibility of utilizing Te as a high-volumetric-capacity active material for storage of K + ions and will advance the practical application of KIBs.
研究领域:
储能
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材料科学
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电化学
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电池技术
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
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IF 9.8
Fanteng Ma,Chengshuo Hou,Ziheng Zhou,Zhen Li,Yingjie Dong,Jinglin Mu,Xiaozhong Wu,Jin Zhou
Potassium-ion batteries (PIBs) are emerging as a viable alternative to lithium-ion batteries due to the abundance of potassium resources and a standard electrode potential of K + /K close to that of Li + /Li. However, the larger ionic radius of K + induce huge volume change of electrode materials and slow electrochemical kinetics, significantly limiting the K + storage capacity and cycling stability of PIBs. Herein, S-doped porous carbon nanosheets (S-PCNs) are prepared by a facile direct sulfuration method. The S-PCNs-500 possesses high sulfur doping level of 9.1 at.% composed of covalent sulfur (C-S-C), oxidized sulfur, and some trapped molecular sulfur. This sample exhibits excellent potassium ion storage performance as anode material of PIBs, such as high capacity of 448 mAh g −1 at 0.05 A g −1 , high-rate capability of 180 at 10 A g −1 , and long cycle life with 252 mA h g −1 at 1 A g −1 after 1200 cycles. A full cell with a S-PCNs-500 anode and K 0.4 Mn 0.9 Li 0.1 O 2 0.33H 2 O cathode delivers a reversible capacity of 160 mAh g −1 at 0.1 A g −1 , responding to an energy density of 306.4 Wh kg −1 . These characteristics are attributed to the reversible intercalation of K + into the expanded carbon layers, pseudocapacitive K + sorption at structural chemical defects, and reversible electrochemical reaction between K + and C-S-C.
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
·
IF 5.9
Yan Gu,Ya Ru Pei,Ming Zhao,Guo Yong Wang,Chun Cheng Yang,Qing Jiang
Potassium-ion batteries (PIBs) have gained tremendous attention to compete with lithium-ion batteries (LIBs), especially for storing energy on a large scale, due to their dominance in the geographical distribution of K resources and similar energy storage mechanisms. Herein, using an electrospinning method, we synthesized a unique material of carbon nanonecklaces with a high content of N-doping (N-CNN). The N-CNN-700 anode (N-CNN annealed at 700 °C) shows outstanding durability in PIBs, delivering 173 mAh g–1 after 1000 cycles at 1 A g–1. The unique characteristics of ultrahigh pyrrolic/pyridinic-N doping and hollow necklace-like structures account for excellent performance, which can enable fast electrolyte diffusion, increase active sites for K+ insertion, and enhance K+ adsorption ability. This object demonstrates a clever strategy to design a structure for improved energy storage technologies.
研究领域:
材料科学
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能量存储
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Chemical Science
·
2024
·Vol. 16
·期 1
·425-429
·
IF 7.6
Ang Li,Ziqi Wang,Yunhua Xu
A novel buckled-layer K1.39Mn3O6 cathode was synthesized, featuring P2-oxygen stacking and P3-K sites. The presence of two independent manganese sites significantly influences the charge distribution and diffusion pathways of potassium ions during the charge and discharge processes, resulting in exceptional electrochemical performance. A reversible capacity of 105 mA h g−1 at 100 mA g−1 and remarkable rate capability of 70 mA h g−1 at 1 A g−1 were achieved, surpassing those of most previously reported layered transition metal oxide cathodes. The findings facilitate the development of innovative cathode materials.
研究领域:
材料科学
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电化学
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能源存储
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无机化学
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固态化学
✓ 已验证
DOI
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
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2022
·
IF 4.831
Min Shen,Tingting Pan,Juewei Ning,Fangyuan Sun,Mengyu Deng,Jianxiang Liao,Fengyu Su,Yanqing Tian
The concentration of potassium ion is an important indicator for human health, and its abnormality is often accompanied by various diseases. However, most tools currently used to study potassium ion transport are low throughput. Herein, we reported a new K + fluorescent nanoprobe CP1-KS with high selectivity and sensitivity to K + (fluorescence enhanced factor was up to 9.91 at 20 mM K + ). The polymeric fluorescent probe CP1-KS was composed of the small-molecular K + indicator KS and amphiphilic copolymer CP1. This sensor can be easily and uniformly dispersed in cell culture medium and is suitable for high throughput analysis. To assess the utility of the probe CP1-KS in biological field, this probe was employed as an extracellular fluorescent probe to monitor the efflux of K + from cells ( E coli , B. Subtilis 168, Hela and MCF-7 cells) under various stimulation including lysozyme, nigericin, digitonin, and ATP. Results demonstrated that CP1-KS is an effective analysis tool for extracellular K + concentration. We believe that the nanoprobe has great potential in antibacterial drug screening, K + ionophore function, K + channel activity, cell membrane permeability analysis or other K + related field in the future.
研究领域:
生物技术
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细胞生物学
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药理学
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分析化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Small
·
2023
·Vol. 19
·期 28
·2207080
·
IF 13.3
Wenli Shu,Meng Huang,Lishan Geng,Fan Qiao,Xuanpeng Wang
Prussian blue analogs (PBAs) are promising cathode materials for potassium-ion batteries (KIBs) owing to their large open framework structure. As the K + migration rate and storage sites rely highly on the periodic lattice arrangement, it is rather important to guarantee the high crystallinity of PBAs. Herein, highly crystalline K 2 Fe[Fe(CN) 6 ] (KFeHCF-E) is synthesized by coprecipitation, adopting the ethylenediaminetetraacetic acid dipotassium salt as a chelating agent. As a result, an excellent rate capability and ultra-long lifespan (5000 cycles at 100 mA g −1 with 61.3% capacity maintenance) are achieved when tested in KIBs. The highest K + migration rate of 10 −9 cm 2 s −1 in the bulk phase is determined by the galvanostatic intermittent titration technique. Remarkably, the robust lattice structure and reversible solid-phase K + storage mechanism of KFeHCF-E are proved by in situ XRD. This work offers a simple crystallinity optimization method for developing high-performance PBAs cathode materials in advanced KIBs.
研究领域:
材料科学
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电化学
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能源存储
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无机化学
·
纳米材料
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2025
·
IF 9.8
Lei Yang,Weina Jiang,Xinyu Wang,Wancheng Ren,Huanlei Wang
Structural design and heteroatom doping of hard carbon are crucial strategies for enhancing their potassium-ion storage performance. Herein, fluorine-doped hollow porous hard carbon spheres (FHCS) are synthesized via an in-situ template coupled with fluorination strategy. The hollows carbon spherical architecture of FHCS provides abundant porosity and defects for potassium-ion adsorption while effectively mitigating volume expansion during K + insertion/extraction. Moreover, the high-content doping of fluorine element further increases the defect density of FHCS. These characteristics guarantee that the FHCS anode exhibits a predominantly adsorption-driven K + storage mechanism, contributing 81.8 % of the total capacity at 1.0 mV s −1 . As a result, the FHCS anode delivers exceptional reversible capacity (381 mAh g −1 at 0.1 A g −1 ), outstanding rate capability (194 mAh g −1 at 10 A g −1 ), and remarkable cycling stability of 83.8 % capacity retention after 3000 cycles. Furthermore, the potassium-ion hybrid capacitor assembled with FHCS anode exhibits high energy density (104 Wh kg −1 ). This study provides an effective strategy for the rational design of hard carbon and the advancement of high-performance K + storage.
研究领域:
材料科学
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电化学储能
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纳米材料
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能源化学
·
固态离子学
✓ 已验证
产品关联
DOI
高影响因子
MATERIALS & DESIGN
·
2021
·
IF 7.991
Long Pang,Haohui Feng,Wei Zhong,Haonan Dong,Youqing Shen,Bing Yu,Hailin Cong
Chemotherapy is one of the most used method for cancer therapy, however, brings huge pain to patients as the drugs commonly causes side effects. Inducing tumor cells apoptosis by perturbing ion homeostasis is a novel approach to replace chemotherapy in recent years. Crown ether has been widely used since it was discovered in the last century and has shown its potential in biological applications. The aim of this paper is to design a series of novel nanometer micelles with crown ether on their surface. Crown ether was connected to a commonly used amphiphilic polymeric carrier, PEG-PCL, through ester bond (CPMs). Micelles about 120 nm in diameter were formed in aqueous solution. The micelles could capture potassium ions prominently in both aqueous solution and tumor cells. In vitro and in vivo experiments showed that the CPMs had certain anti-tumor activity, indicating that the CPMs had anti-tumor potential.
研究领域:
药学
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生物化学
·
肿瘤学
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Jingjing Wu,Bo Yuan,Yuyang Gu,Yifan Zhang,Zhongyuan Yan,Lida Zhang,Xusheng Yang,Haijiao Zhang,Ling Bai,Ziquan Li,Zhen-Dong Huang
In this work, a multifunctional BiOCl/amorphous antimony oxide (AAO) hetero-hybrid with the molar ratio of Bi 3+ /Sb 3+ in 1/3 (1-BOC/3-AAO) is successfully developed by the scalable ball-milling strategy and demonstrates an exceptional visible light photocatalytic degradation performance of RhB and superior anodic potassium ion storage performance for potassium ion batteries over other reported BOC materials, benefitted from the large specific surface area , narrow band gap, improved utilization of visible light, effectively suppressed recombination and highly enhanced transfer efficiency of the photogenerated charge carriers of the hetero-hybrid. Under the light irradiation of a 300 W xenon lamp without and with an optical filter (≥ 420 nm), almost 100.0% RhB in the aqueous solution can be degraded after 20 mins. At the same time, the as-prepared 1-BOC/3-AAO also demonstrate a superior potassium ion storage over other reported BOC-based materials. The potassium half-cell assembled with as-prepared 1-BOC/3-AAO as working electrodes can deliver an initial charge capacity of 505.3 and 395.9 mAhg −1 at the current density of 100 and 500 mAg −1 , meanwhile, maintains 427.7 after 500 cycles at 100 mAg −1 and 316.9 mAhg −1 after 800 cycles at 500 mAg −1 , respectively. Therefore, BOC/AAO hetero-hybrids will be a promising candidate commercial catalyst for degradation of organic pollutes within the industrial waste water and promising high performance anode materials for potassium ion batteries .
研究领域:
材料科学
·
物理化学
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能源存储
·
环境催化
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纳米材料
·
电化学
✓ 已验证
DOI
高影响因子
CARBON
·
2021
·
IF 9.594
Na Yang,Rong Shao,Zhengping Zhang,Meiling Dou,Jin Niu,Feng Wang
Gelatin, a natural macromolecular substance formed by the hydrolysis of collagen, offers the advantages of abundant resources and low cost. It is a good precursor for the synthesis of N, O-doped carbon materials. Although some gelatin-derived carbon materials have been used for electrochemical energy storage , there have been few studies for the mechanism of gelatin carbonization . In addition, the influence of heteroatoms and defects on the K-ion storage performance remains unclear. In this work, in situ and ex situ characterization methods have been used to study the mechanism of gelatin carbonization. The pathways leading to formation of the carbon framework, heteroatom doping and defect generation in gelatin-based carbons during the pyrolysis process have been clearly identified. Moreover, by means of DFT calculations and experimental measurements, it has been confirmed that heteroatoms and defects both play important roles in improving the storage performance of potassium ions. By virtue of its abundance of both heteroatoms and defects, our optimized anode shows better electrochemical performance than graphite anodes. This study not only clarifies our understanding of carbonization mechanism and mechanism of K-ion storage in carbon materials, but also provides pathways for the synthesis and applications of new carbon-based anode materials for alkali-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）