ELECTROCHIMICA ACTA
·
2022
·
IF 7.336
Usman Ghani,Nousheen Iqbal,Jinghan Li,Ahmed A. Aboalhassan,Boya Sun,Bowen Liu,Farman Ullah,Johar Zeb,Muhammed Imtiaz,Jiajun Gu,Qinglei Liu
Porous hard carbons (PHC) are promising anode materials in sodium-ion batteries; however, the availability of large surface area creates numerous irreversible active sites that cause rapid initial cycle capacity fading and electrode degradation, resulting in lower specific capacity and poor cycle stability. PHC surface modification via 2D transition metal dichalcogenides is a synergistic approach to combine excellent electrochemical properties of both materials and resolve these issues. Therefore, we designed 1T MoS 2 nanopatterned PHC skeleton using carbonization and hydrothermal treatment of biomass (chickpea husk). As a result, HC@MoS 2 -II electrode with extended d 002 spacing of MoS 2 nanolayers (0.650 nm) exhibited an excellent specific capacity of 470 mAh/g at 50 mA/g with high initial coulombic efficiency (63%) and ultra-long cycle stability (190 mAh/g) at 1000 mA/g over 3500 cycles. The extraordinary electrochemical performance can be attributed to the synergistic assembly, where the high surface area PHC skeleton effectively buffered large volume expansion during charging/discharging, and 1T MoS 2 nanoflowers added fast ionic diffusion kinetics and PHC surface protection.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2024
·
IF 4.9
Peng xia,Zhaoxia Qin,Shengdong Jing,Shilan Li,Xiaoli Peng,Long Yuan,Shengjun Lu,Yufei Zhang,Haosen Fan
Potassium ion batteries (PIBs) have attracted considerable attention owing to their unique advantages. Nevertheless, the large radius of potassium ions and their sluggish kinetics hinder the further development of potassium ion batteries. In this study, mesoporous hard carbon nanospheres (PCN- x , where x corresponds to pyrolysis temperatures of 700 ℃, 800 ℃, and 900 ℃) have been successfully prepared from a facile hydrothermal and pyrolysis processes at different temperatures of phenolic resin precursor. The obtained PCN- x materials offer several advantages, including abundant active sites, favorable interlayer spacing (0.4113 nm), high specific surface area (574.720 2 m 2 g −1 ), and exceptional structural stability . These merits collectively contribute to enhancing the stability of potassium ion intercalation/deintercalation behavior and provide a high pseudocapacitive capacity. While used as anode materials for PIBs, these materials exhibit remarkable battery performance, including a superior initial charge capacity of 395.2 mAh g −1 at the current rate of 100 mA g −1 , exemplary rate performance (209 mAh g −1 at 5 A g −1 ), and outstanding cycle stability, retaining a capacity of 249 mAh g −1 after 1000 cycles. The present work introduces a low-cost and straightforward method for the preparation of anode materials of PIBs and provides valuable insights into the energy storage field.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
Small
·
2021
·Vol. 18
·期 8
·2104296
·
IF 13.281
Shaokun Chong,Lingling Yuan,Ting Li,Chengyong Shu,Shuangyan Qiao,Shihong Dong,Zhengqing Liu,Jing Yang,Hua Kun Liu,Shi Xue Dou,Wei Huang
The investigation of carbonaceous-based anode materials will promote the fast application of low-cost potassium-ion batteries (PIBs). Here a nitrogen and oxygen co-doped yolk-shell carbon sphere (NO-YS-CS) is constructed as anode material for K-ion storage. The novel architecture, featuring with developed porous structure and high surface specific area, is beneficial to achieving excellent electrochemical kinetics behavior and great electrode stability from buffering the large volume expansion. Furthermore, the N/O heteroatoms co-doping can not only boost the adsorption and intercalation ability of K-ion but also increase the electron transfer capability. It is also demonstrated by experimental results and DFT calculations that K-ion insertion/extraction proceeds through both intercalation and surface capacitive adsorption mechanisms. As expected, the NO-YS-CS electrodes show high initial charge capacity of 473.7 mAh g −1 at 20 mA g −1 , ultralong cycling life over 2500 cycles with the retention of 85.8% at 500 mA g −1 , and superior rate performance (183.3 mAh g −1 at 1.0 A g −1 ). The K-ion full cell, with a high energy density of 271.4 Wh kg −1 and an excellent cyclic stability over 500 cycles, is successfully fabricated with K 2 Fe[Fe(CN) 6 ] cathode. This work will provide new insight on the synthesis and mechanism understanding of high-performance hard carbon anode for PIBs.
研究领域:
材料科学
·
能源存储
·
电化学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Usman Ghani,Nousheen Iqbal,Ahmed A. Aboalhassan,Chenxin Zhou,Bowen Liu,Jinghan Li,Yan Fang,Tabish Aftab,Jiajun Gu,Qinglei Liu
The use of porous hard carbons (PHCs) as electrode materials in sodium-ion batteries has great potential; however, the exposure of large surface areas to electrolyte flow results in irregular and irreversible solid electrolyte interfaces (SEIs), leading to deteriorated ionic and electronic mobility and inferior initial Coulombic efficiency (ICE). These issues can be addressed through suitable structural modifications of PHC materials. Herein, the integration of high-surface-area PHCs with carbon nanofibers (CNFs) was accomplished by a simple electrospinning technique, which resulted in a uniform and reversible SEI layer. In the meantime, the CNFs’ mesh provided connectivity and conductivity in the as-integrated electrodes, whereas PHCs offered fast diffusion kinetics and high Na+ ion storage capacity. Additionally, PHC integration with CNFs demonstrated an excellent ICE of 77% and a specific capacity of 505 mAh/g at 25 mA/g. Furthermore, the conjugated microstructure also provided flexibility and stability to the electrode (260 mAh/g after 500 cycles). This remarkable synergy may promote the development of free-standing, flexible, and highly porous properties in a single material for advanced energy storage applications.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
电池技术
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Si Yi,Zhilin Yan,Xingda Li,Zhen Wang,Pengpeng Ning,Jingwen Zhang,Jinlan Huang,Deren Yang,Ning Du
With the rapid progress of portable electronics and electric vehicles , high-energy lithium-ion batteries (LIBs) with fast-charging technology are urgently required. Silicon (Si) is considered as the most promising anode candidate for high-energy LIBs but challenging to large-scale commercialization due to its huge volume change and poor conductivity. To develop high-capacity Si-based anode materials with enhanced lithium-ion diffusion and fast reaction kinetics, we design a novel high-Si-content Si/hard carbon composite via scalable methods. The combination between phosphorus-doped hard carbon with porous structure and uniformly distributed Si nanolayers effectively improve lithium-ion kinetics and mitigate the volume change of Si. As a result, the architecture delivers a reversible capacity of 1124 mAh/g at 0.1C and superior cycling stability with an 87.4% capacity retention after 200 cycles at 1C. The 1.5 A h pouch-type full-cell tests further demonstrate good cycling stability and high rate performance at 4C under an electrode density of 1.6 g cm −3 and areal capacity loading of 3.53 mAh cm −2 . This work paves a new way for the rational design of Si-based anode materials for high-energy and high-power LIBs.
研究领域:
材料科学
·
能源存储与转换
✓ 已验证
产品关联
DOI
高影响因子
MICROPOROUS AND MESOPOROUS MATERIALS
·
2019
·
IF 4.182
Xiaohuan Qi,Tianquan Lin,Shaoning Zhang,Jijian Xu,Huimin Zhang,Fangfang Xu,Fuqiang Huang
Nitrogen-doped hierarchical porous hard carbon (NPC) that are capable of high N content, high specific surface area and high chemical stability has the potential to be a promising electrode material for energy storage application. Here we report a N-doped hierarchical porous hard carbon via a facile Ti-peroxy initiated in-situ polymerization of p -phenylenediamine. Ti-peroxy can also serve as a hard template to manipulate the formation of hierarchical porous. This nitrogen-doped hierarchical porous hard carbon has advantages of high N-content (7.2 at. %) and high surface area (1515 m 2 g −1 ), displaying a specific capacitance of 360 F g −1 and an extraordinary cycling stability above 98% after 30,000 cycles.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 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）