JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2024
·Vol. 35
·期 5
·1-12
·
IF 2.8
Huang Ruifeng,Wang Weixing,Xiong Deping,Chen Li,Feng Zuyong,Wen Kunhua,Li Zhaoying,Xu Chenhao,He Miao
This paper presents a novel approach for optimizing potassium-ion battery electrode materials. By employing a pre-bonding technique, we have effectively combined the strengths of hard carbon’s rapid potassium-ion adsorption and graphite’s extensive potassium storage. The resulting pre-bonded carbon (PBC) composite exhibits remarkable electrochemical performance with exceptional stability. Electrochemical characterizations, along with SEM, Raman, XRD, and macroscopic observations, provide insights into PBC’s advantages. PBC’s structural integrity, maintained even after extended cycling, highlights its capacity to protect the graphite structure from damage. This buffering effect is especially significant under high current conditions. Furthermore, the pre-bonding process enables PBC to store potassium effectively, ensuring a high energy density for the negative electrode material. In contrast, samples mixed without pre-bonding exhibit poor adhesion between hard carbon and graphite, leading to graphite breakage and reduced electrochemical performance. PBC’s simplicity of implementation and compatibility with existing production systems make it a valuable addition to potassium-ion battery development, particularly in large-scale energy storage applications. The findings underscore the significance of pre-bonding as a promising technique to optimize potassium-ion battery electrode materials.
研究领域:
储能
·
材料科学
·
电化学
·
纳米技术
·
电池技术
✓ 已验证
DOI
高影响因子
CHINESE JOURNAL OF ANALYTICAL CHEMISTRY
·
2015
·Vol. 43
·期 10
·1569-1572
·
IF 0.754
Ming-Yan LUO,Bei LÜ,Guo-Bin SHEN,Fei-Fang ZHANG,Bing-Cheng YANG
Electrodialytic eluent generator, one of the key components of ion chromatography system, was fabricated and evaluated. The data achieved indicated that its performance could be comparable to that of commercial one. The maximal operation pressure was over 20 MPa, the generated KOH concentration was up to 100 mM, and the designed usage lifetime was about 354 day (take 8 h working time per day). This device will be helpful to the improvement of domestic instruments of ion chromatography.
研究领域:
分析化学
·
仪器科学与技术
·
分离科学
·
离子色谱技术
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2019
·Vol. 7
·期 2
·394-401
·
IF 5.934
Yushan Luo,Mengli Tao,Jianhua Deng,Renming Zhan,Bingshu Guo,Qianru Ma,Muhammad Kashif Aslam,Yuruo Qi,Maowen Xu
K-ion batteries (KIBs) are considered as one of the most promising devices for large-scale energy storage because of the comparable output voltage with lithium-ion batteries and the abundant reserves of potassium. FeS2 is regarded as a kind of very important anode material for KIBs due to its low cost and high capacity. However, the poor electronic conductivity and huge volume expansion of FeS2 during the discharge/charge process strongly inhibit the K-storage performance. To solve these problems, herein, unique core–shell FeS2@C nanocubes with nanoparticles in the interior and carbon shells in the exterior are designed. The inside FeS2 nanoparticles are beneficial for K+ diffusion and the penetration of the electrolyte, while the outside carbon shells can enhance the electronic conductivity and suppress the volume expansion. The unique core–shell structure displays outstanding K-storage performance with impressive specific capacity, excellent cycling stability, and superior rate capability with 73% capacity retention at 2 A g−1. This work not only provides solutions to obtain a superior anode material for KIBs but also offers insights into designing a hierarchical structure for energy storage systems.
研究领域:
材料科学
·
能源化学
·
纳米技术
·
电化学储能
✓ 已验证
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Jun Wang,Le Wang,Jiuyun Zhang,Zhixuan Wang,Yitao Liu,Wei Cai,Bin Fei,Renming Pan,Xia Zhou
The explosion characteristics of gases generated from the overcharged thermal runaway (TR) process of NCM pouch cell were investigated. Specially, the gases mainly include H 2 , CH 4 , C 2 H 4 , C 2 H 6 , C 3 H 6 , and CO, and its maximum explosion pressure (MEP) concentration is 25% (volume ratio). The lower explosion limit of TR gas is 11.15%, and the upper explosion limit is 36.875%. To reduce the risk of an explosion from the TR gas, a unique aerosol explosion suppression agent (ASA) was prepared using simple three-component raw materials and a freeze-drying process. For the TR gas explosion at MEP concentration, the ASA-0.3 g can decrease MEP by 74.64% and maximum explosion pressure rate (MPR) by 97.67%. The ASA-0.5 g can completely inhibit the explosion. The mixed gas was 5.3 L, so the explosion suppression concentration of ASA is 0.095 g·L -1 . It is found that ASA consists of a gas mixture of N 2 and CO 2 and solid reactive particle (SRP). The anhydrous SRP contains 33% nanoscale KHCO 3 particles with a particle size mainly range of 0.1–1 μm. And the D90 of SRP is about 0.63 μm. The minimum extinguishing concentration of ASA is from 30 to 40 g·m -3 . Additionally, typical radiation spectra of potassium ions are found during the explosion suppression process, which indicates that potassium ions in SRP are involved in the reaction of ASA and TR gas during the explosion suppression process. Therefore, ASA can efficiently suppress the explosion of TR gas through its chemical inhibition mechanism, primarily by terminating free radical chain reactions.
研究领域:
能源科学
·
安全工程
·
化学工程
✓ 已验证
DOI
高影响因子
CHEMISTRY-A EUROPEAN JOURNAL
·
2020
·Vol. 26
·期 26
·5818-5823
·
IF 4.857
Xu Yang,Rongyu Zhang,Shifeng Xu,Dan Xu,Jia Ma,Zhongyu Zhang,Shu Yang
Graphical Under cover : A graphene/amorphous carbon restriction structure is designed for an Sb anode, in which the anode is protected from pulverization and aggregation, thus leading to the excellent stability and long lifespan of Sb in K-ion batteries. Sb-based materials have attracted much attention owing to their ability to undergo a multi-electron alloy reaction with K + . However, there are still the serious problems of volume change and aggregation of particles, which lead to rapid capacity fading and a limited lifespan. In this work, a graphene/amorphous carbon restriction structure is proposed, in which the amorphous carbon layer on the surface of Sb nanoparticles can protect the particles from pulverization, and the graphene can buffer the volume change of the material. In addition, the conductive network formed by the dual carbon structure effectively improves the rate performance of the material. Thus, the material delivers a high capacity of 550 mA h g −1 at 100 mA g −1 , a rate capability of 370 mA h g −1 at 2000 mA g −1 , and a long lifespan of 350 cycles without significant capacity fading. The dual carbon strategy proposed offers a reference for the design of high-performance anode materials.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2020
·
IF 0
Ebrahim Ataeivarjovi,Yubing Liu,Zhigang Tang,Hao Ding,Dong Guo,Xiaofei Song,Guoxun Ben,Mengyue Zhou
The desorption process of CO2 absorbed by the hot-potash-alkali method was studied in this paper. In a traditional hot-potash-alkali process, the temperatures of KHCO3 aqueous solutions are high, moisture vaporization is serious, and energy consumption is high. We proposed that membrane desorption can be used instead of heating desorption and conducted relevant research. PDMS-PTFE-PVDF/PET was used as a composite membrane. The water evaporation considerably declined, and the decomposition conversion rate reduced to 25.5% as the equilibrium liquid-phase concentration decreased. Results show that the PDMS-PTFE-PVDF/PET composite membrane loaded with 1 wt % TiO(OH)2 nanoparticles can be used for membrane desorption, while the decomposition conversion rate of the KHCO3 aqueous solution decreased by only 4.2% after 10 cycles, and the effect was considerably improved. The comprehensive capture energy consumption was about 65% lower than that of the absorption-heating desorption process on account of the positive effect of TiO(OH)2 nanoparticles. Brief calculation, which is based on CO2 concentration tested by a gas analyzer and the linear fitting of the Arrhenius equation, demonstrates that the reaction activation energy can be reduced (Supporting Information).
研究领域:
环境科学
·
材料科学
·
化学工程
✓ 已验证
DOI
Nature Communications
·
2023
·Vol. 14
·期 1
·1-11
·
IF 16.6
Tang Mengyao,Dong Shuai,Wang Jiawei,Cheng Liwei,Zhu Qiaonan,Li Yanmei,Yang Xiuyi,Guo Lin,Wang Hua
In contrast to conventional batteries, anode-free configurations can extend cell-level energy densities closer to the theoretical limit. However, realizing alkali metal plating/stripping on a bare current collector with high reversibility is challenging, especially at low temperature, as an unstable solid-electrolyte interphase and uncontrolled dendrite growth occur more easily. Here, a low-temperature anode-free potassium (K) metal non-aqueous battery is reported. By introducing Si-O-based additives, namely polydimethylsiloxane, in a weak-solvation low-concentration electrolyte of 0.4 M potassium hexafluorophosphate in 1,2-dimethoxyethane, the in situ formed potassiophilic interface enables uniform K deposition, and offers K||Cu cells with an average K plating/stripping Coulombic efficiency of 99.80% at −40 °C. Consequently, anode-free Cu||prepotassiated 3,4,9,10-perylene-tetracarboxylicacid-dianhydride full batteries achieve stable cycling with a high specific energy of 152 Wh kg −1 based on the total mass of the negative and positive electrodes at 0.2 C (26 mA g −1 ) charge/discharge and −40 °C.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
·
2021
·Vol. 118
·期 35
·e2110912118
·
IF 11.205
Xianlu Lu,Xuenan Pan,Dongdong Zhang,Zhi Fang,Shang Xu,Yu Ma,Qiao Liu,Gang Shao,Dingfa Fu,Jie Teng,Weiyou Yang
The popularly reported energy storage mechanisms of potassium-ion batteries (PIBs) are based on alloy-, de-intercalation-, and conversion-type processes, which inevitably lead to structural damage of the electrodes caused by intercalation/de-intercalation of K+ with a relatively large radius, which is accompanied by poor cycle stabilities. Here, we report the exploration of robust high-temperature PIBs enabled by a carboxyl functional group energy storage mechanism, which is based on an example of p-phthalic acid (PTA) with two carboxyl functional groups as the redox centers. In such a case, the intercalation/de-intercalation of K+ can be performed via surface reactions with relieved volume change, thus favoring excellent cycle stability for PIBs against high temperatures. As proof of concept, at the fixed working temperature of 62.5 °C, the initial discharge and charge specific capacities of the PTA electrode are ∼660 and 165 mA⋅h⋅g−1, respectively, at a current density of 100 mA⋅g−1, with 86% specific capacity retention after 160 cycles. Meanwhile, it delivers 81.5% specific capacity retention after 390 cycles under a high current density of 500 mA⋅g−1. The cycle stabilities achieved under both low and high current densities are the best among those of high-temperature PIBs reported previously.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2020
·
IF 6.182
Yang Liu,Qiang Ru,Yuqing Gao,Qinyou An,Fuming Chen,Zhenglu Shi,Minhui Zheng,Zikang Pan
Potassium-ion batteries are considered as one of safe and low-cost alternatives to the traditional lithium-ion batteries. However, the sluggish potassium ion kinetics, drastic volume variation and inferior cyclic reversibility hinder the further development for the commercial applications. Herein, a new type of polyimide-inspired volcanic rock-like carbon is synthesized by pyrolyzing N/O-rich polymer precursor of polymeric 1, 4, 5, 8-Naphthalenetetracarboxylic dianhydride (PNTCDA). The synergetic effect of the mesoporous construction, the prominent capacitance and the ameliorated conductivity endows PNTCDA@900 with boosted potassium-ion electrochemical properties. As anodes for PIBs, the discharge capacity of 185.3 mAh g −1 can be achievable after 100 cycles at a current density of 0.05 A g −1 , and the superior reversible capacity of 81 mAh g −1 is obtained even after 4000 cycles at a high current density of 2 A g −1 . The cell can be operated in a reliable environmental adaptability with 115–205 mAh g −1 from −5 °C~70 °C at 0.1 A g −1 . Furthermore, when applied to potassium-ion hybrid capacitors with active carbon as cathode, PNTCDA@900 delivers a reversible capacity of 53.5 mAh g −1 after 800 cycles at 2 A g −1 . The current work will be significant for the development of potassium-ion storage.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
Small
·
2022
·Vol. 18
·期 15
·2107252
·
IF 15.153
Zhen Kong,Lu Wang,Sikandar Iqbal,Bo Zhang,Bin Wang,Jianmin Dou,Fengbo Wang,Yitai Qian,Meng Zhang,Liqiang Xu
Suitable anode materials with high capacity and long cycling stability, especially capability at high current densities, are urgently needed to advance the development of potassium ion batteries (PIBs) and sodium ion batteries (SIBs). Herein, a porous Ni-doped FeSe 2 /Fe 3 Se 4 heterojunction encapsulated in Se-doped carbon (NF 11 S/C) is designed through selenization of MOFs precursor. The porous composite possesses enriched active sites and facilitates transport for both ion and electron. Ni-doping is adopted to enrich the lattice defects and active sites. The Se–C bond and carbon framework endow integrity of the composite and hamper aggregation of selenide nano-particles during potassiation/de-potassiation. The NF 11 S/C exhibits exceptional rate performance and ultra-long cycling stability (177.3 mA h g −1 after 3050 cycles at 2 A g −1 for PIBs and 208.8 mA h g −1 after 2000 cycles at 8 A g −1 for SIBs). The potassiation/de-potassiation mechanism is investigated via ex-situ X-ray powder diffraction, high-resolution transmission electron microscopy, X-ray photoelectron spectrocopy and Raman analysis. PTCDA//NF 11 S/C full cell stably cycles for 1200 cycles at 200 mA g −1 with a capacity of 103.7 mA h g −1 , indicating the high application potential of the electrode for highly stable rechargeable batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
SYNTHESIS-STUTTGART
·
2024
·
IF 2.2
Taijie Guo,Wei Wang,Long Xu,Jiajia Dong
Here we report the utilization of NH-sulfamoyl fluorides (RNHSO2F) as reliable SuFEx synthons for the construction of various sulfamate esters. By using potassium fluoride as base, we are able to convert RNHSO2F to azasulfene intermediates under mild conditions and guarantee their further efficent ligation with phenols and alcohols.
研究领域:
有机化学
·
合成化学
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Weijia Guo,Chao Geng,Zongfu Sun,Jiangmin Jiang,Zhicheng Ju
Amorphous carbon is considered as a potential anode material for potassium ion batteries due to its advantages of low cost, diverse precursors and structural plasticity. However, constructing a rational carbon structure through a simple fabrication process to achieve superior potassium storage remains challenging yet. Herein, carbonized pre-oxidation coal tar pitch (CPO-CTP) with controlled microstructure is proposed to boost potassium storage capacity and rate capability. Introducing oxygen-containing functional groups into coal tar pitch (CTP) can induce the establishment of cross-linked structures, which can limit the rearrangement of carbon layers during the carbonization process and is the key to disorder in the microstructure. Benefiting from a rational pre-oxidation approach, CPO-CTP200 exhibits both rich active sites and fast K + diffusion kinetics, resulting in high charge capacity (460.8 mAh g −1 at 0.05 A g −1 after 50 cycles) and high rate (189.8 mAh g −1 at 2 A g −1 ), as well as favourable initial Coulombic efficiency (67.12%). This study provides a promising approach for large-scale production of high-performance carbon anode materials for batteries based on CTP through a green pre-oxidation strategy.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）