ChemSusChem
·
2023
·Vol. 16
·期 17
·e202300493
·
IF 8.4
Yong-Feng Shen,Meng-Meng Zhang,Dong Yan,Jia-He Lv,Tao Wu,Bin He,Wen-Cui Li
Graphical From petroleum coke : Soft carbon cathode with superb rate performance for dual-ion batteries is presented. In situ XRD and Raman show that PF 6 − anions form stage-1 graphite intercalation compounds in the surface region, and directly stage-2 in the bulk, skipping the conversion from stage-4 to stage-2 due to the benefit of surface effect. The improved reaction kinetics results in better rate performance than that of conventional graphite. Dual-ion battery is a new type of battery in which both anions and cations participate in the energy storage process. However, this unique battery configuration imposes high requirements on the cathode, which typically presents a poor rate performance due to the sluggish diffusion dynamics and intercalation reaction kinetics of anions. Herein, we report petroleum coke-based soft carbon as the cathode for dual-ion batteries, exhibiting a superior rate performance with a specific capacity of 96 mAh g −1 at a rate of 2 C and 72 mAh g −1 remained even at 50 C. In situ XRD and Raman demonstrate that the anions can directly form lower-stage graphite intercalation compounds during the charge process owing to the surface effect, skipping the long evolutionary process from higher to lower stage, thus significantly improving the rate performance. This study highlights the impact of the surface effect and provides a promising perspective for dual-ion batteries.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Nano
·
2024
·
IF 15.8
Ming Yang,Kaiqi Yang,Yujing Wu,Zhixuan Wang,Tenghuan Ma,Dengxu Wu,Li Yang,Jieru Xu,Pushun Lu,Jian Peng,Zhiwen Jiang,Xiang Zhu,Qifa Gao,Fuqiang Xu,Liquan Chen,Hong Li,Fan Wu
The accelerated formation of lithium dendrites has considerably impeded the advancement and practical deployment of all-solid-state lithium metal batteries (ASSLMBs). In this study, a soft carbon (SC)–Li3N interface layer was developed with both ionic and electronic conductivity, for which the in situ lithiation reaction not only lithiated SC into LiC6 with good electronic/ionic conductivity but also successfully transformed the mixed-phase Li3N into pure-phase β-Li3N with a high ionic conductivity/ion diffusion coefficient and stability to lithium metal. The mixed conductive interface layer facilitates fast Li+ transport at the interface and induces the homogeneous deposition of lithium metal inside it. This effectively inhibits the formation of lithium dendrites and greatly improves the performance of the ASSLMB. The ASSLMB assembled with the SC–Li3N interface layer exhibits high areal capacity (15 mA h cm–2), high current density (7.5 mA cm–2), and long cycle life (6000 cycles). These results indicate that this interface layer has great potential for practical applications in high-energy-density ASSLMBs.
研究领域:
材料科学
·
电化学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
·
2023
·Vol. 34
·期 20
·1-12
·
IF 2.8
Chen Yongzhi,Wen Xu,Zhang Xiaohong,Yang Chao,Wang Lihua,Zhou Lingfeng,Li Zuohong,Deng Haobo,Li Jian
The recycled graphite (RG) and a new type of recycled graphite with multi-layer coating structure (RGC) were prepared by using spent graphite and asphalt. The electrochemical properties and coatings of RG and RGC were also investigated. The low graphitization degree of hard carbon and soft carbon was beneficial to improve the electrochemical properties of regenerated graphite, which was verified by first principles. The unique structure (soft carbon/ hard carbon/ graphite) limited the volume expansion of hard carbon and graphite when lithium ions were embedded or extruded, which improved the rate capability and cycling performance of the battery. Compared with spent graphite (SG) and recycled graphite (RG), the first charge-specific capacity of RGC at 0.1 C was 349.17 mAh·g − 1 , and the coulombic efficiency was 82.47%. Impressive reversible capacity was 263.38 mAh·g − 1 after 130 cycles at 0.5 C and discharge capacity of 188 mAh·g − 1 at 1 C. Due to the pre-lithiation of RGC, the first coulomb efficiency (99.49%) of the full battery (18,650) was higher than that of commercial graphite, and the energy conservation rate was 65.6% after 2000 cycles. This study provides a simple and effective scheme, and realizes the clean recovery and high value commercial application of spent graphite.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2022
·
IF 9.965
Chang Liu,Hongjie Zheng,Yuwei Wang,Nan Xiao,Kai Yu,Hui Li,Xu Zhang,Hongcun Bai,Tianyi Ma,Jieshan Qiu
Soft carbon has been regarded as one of the most promising anode materials for potassium-ion batteries. However, the rearrangement of planar aromatics at high carbonization temperature usually yields a highly graphitized structure, which generally leads to inferior rate and cycle performance. In addition, the role of intrinsic carbon defects on potassium storage has not been well reported yet. In this work, crosslinked pitch-based soft carbon nanosheets have been synthesized through the iodination/dehydroiodination process at low temperature and carbonization with NaCl template. The iodine-treatment efficiently crosslinks the planar aromatics to three-dimensional framework by alkyl-bridged linkages, and reduces the strong π-π interaction during carbonization. This unique microstructure yields an ordered-in-disordered carbon microstructure, enlarged interlayer spacing, and abundant intrinsic defect sites. Benefited from these merits, the optimal sample displays 140% increase of reversible capacity to the pristine pitch-based carbon at 5 A g −1 . Particularly, it also presents 87.4% capacity retention after 1000 cycles at 1 A g −1 . This facile but simple strategy is expected to expand to other high-performance carbon materials and further understand the effect of intrinsic defects for potassium storage and beyond.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
PubMed
高影响因子
JOURNAL OF POWER SOURCES
·
2020
·
IF 8.247
Fei Wang,Zhenglong Hu,Limin Mao,Jian Mao
Herein, the three-dimensional free-standing nano-silicon @ soft carbon embedded in graphene scaffold composite is prepared to boost the lithium storage property of the silicon anode. For the aspect of “single”, the own volume expansion is relieved by the encapsulated soft carbon layer and the soft carbon layer can suppress the repeated formation of solid electrolyte interface films onto the “single” silicon nanoparticle (SNP). Moreover, the soft carbon layer possesses alternating amorphous and crystalline regions to provide the rapid lithium-ion diffusion channel. On the side of “monolithic”, the 3D free-standing graphene-scaffold loading with evenly distributed SNPs eliminates collisions between SNPs during the charging/discharging cycles, and endows the ‘monolithic’ electrode with excellent electronic conductivity , fast lithium-ion diffusion pathway and high SNPs content. Thus, the above composite anode exhibits superior specific capacity, cycling performance and rate performance, such as around 2600 mA h g −1 (8.34 mA h cm −2 ) of specific capacity at a current density of 0.2 A/g and almost no capacity attenuation after 100 cycles. The design thinking (from ‘single’ to ‘monolithic’) paves a new avenue towards high-performance anodes of silicon and transition metal oxides .
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Lei Yang,Xinyu Wang,Chunliu Zhu,Haozhi Wang,Jing Shi,Jingwei Chen,Weiqian Tian,Yue Zhu,Minghua Huang,Jingyi Wu,Huanlei Wang
Molybdenum sulfide (MoS 2 ) is a prospective anode material for potassium-ion batteries, owing to its large interlayer spacing and superior theoretical capacity. Nevertheless, its practical application is hindered by sluggish kinetics and inferior structural stability, which limit its potassium storage performance. Herein, we employ hollow hard-soft carbon bowls (HSCB), consisting of soft carbon uniformly coated on hard carbon bowls, as nanoreactors to confine few-layered MoS 2 nanosheets. The mesoporous carbon shells of HSCB enhance electrolyte penetration and enable rapid charge transfer and robust structural protection, while the mechanical coupling induced by pore filling, alongside the exist of C S Mo chemical bonds, further reinforces the structural integrity of MoS 2 . Additionally, the creation of few-layered MoS 2 structures and MoS 2 /carbon heterostructures promotes efficient K-ion adsorption and diffusion. Notably, there is a strong linear relationship between MoS 2 content and electrochemical performance, including initial Coulomb efficiency, rate performance, and reaction kinetics. Consequently, the optimized MoS 2 /HSCB anode demonstrating a superior reversible capacity of 630 mAh g −1 at 0.1 A g −1 , an exceptional rate capacity of 251 mAh g −1 at 10 A g −1 , and excellent cycling stability, retaining 369 mAh g −1 at 0.5 A g −1 after 700 cycles. Remarkably, a potassium-ion hybrid capacitor assembled with MoS 2 /HSCB anode achieves superior energy/power densities of 122 Wh kg −1 /11266 W kg −1 , along with splendid capacity retention of 89.5 % after 5000 cycles. This work not only offers an innovative approach for the structural engineering of high-performance sulfide-based composite materials but also elucidates the impact of sulfide content on electrochemical performance.
研究领域:
材料科学
·
能源存储
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Small
·
2023
·Vol. 19
·期 39
·2302537
·
IF 13.3
Haozhen Yang,Junlong Huang,Shaohong Liu,Yongqi Chen,Zongheng Cen,Chenguang Shi,Yuheng Lu,Ruowen Fu
Carbonaceous materials are widely investigated as anodes for potassium-ion batteries (PIBs). However, the inferior rate capability, low areal capacity, and limited working temperature caused by sluggish K-ions diffusion kinetics are still primary challenges for carbon-based anodes. Herein, a simple temperature-programmed co-pyrolysis strategy is proposed for the efficient synthesis of topologically defective soft carbon (TDSC) based on inexpensive pitch and melamine. The skeletons of TDSC are optimized with shortened graphite-like microcrystals, enlarged interlayer spacing, and abundant topological defects (e.g., pentagons, heptagons, and octagons), which endow TDSC with fast pseudocapacitive K-ion intercalation behavior. Meanwhile, micrometer-sized structure can reduce the electrolyte degradation over particle surface and avoid unnecessary voids, ensuring a high initial Coulombic efficiency as well as high energy density. These synergistic structural advantages contribute to excellent rate capability (116 mA h g −1 at 20 C), impressive areal capacity (1.83 mA h cm −2 with a mass loading of 8.32 mg cm −2 ), long-term cycling stability (capacity retention of 91.8% after 1200 h cycling), and low working temperature (−10 °C) of TDSC anodes, demonstrating great potential for the practical application of PIBs.
研究领域:
材料科学
·
能源存储技术
✓ 已验证
DOI
高影响因子
NANOTECHNOLOGY
·
2020
·Vol. 31
·期 28
·285402
·
IF 3.551
X T Zhang,Y F Yuan,M Zhu,G C Cai,Z W Tong,Z Y Yang
Low electronic conductivity and large volume variation result in inferior lithium storage performance of ZnO. To overcome these shortcomings of ZnO, herein ZnO nanoparticles are encapsulated in resorcinol–formaldehyde resin-derived hard carbon and then further assembled into a 3-dimensional mesoporous framework structure using a polyvinyl pyrrolidone-derived soft carbon network. The synthesis methods include the polymerization of resorcinol–formaldehyde resin and a polyvinyl pyrrolidone-boiling method. ZnO@dual carbon has af large specific surface area (153.7 m2 g−1) and high porosity. It exhibits excellent cycling performance and high rate capability. After 350 cycles at 500 mA g−1, the ZnO@dual carbon still delivers a discharge capacity of 701 mAh g−1 while the actual discharge capacity of ZnO reaches 950.9 mAh g−1. At 2 A g−1, ZnO@dual carbon delivers the average discharge capacity of 469.6 mAh g−1. The electrochemical performance of ZnO@dual carbon is remarkably superior to those of ZnO@single carbon, pure carbon and pure ZnO nanoparticles, demonstrating the superiority of the dual carbon-assembly structure. This composite structure greatly improves the structural stability of ZnO, enhances its electron conductivity and overall electron transport capacity; which facilitates electrolyte penetration and Li ion diffusion, leading to improved cycling stability and good rate capability.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Energy Storage
·
2023
·
IF 9.4
Huaran Zhang,Mengxiang Zhu,Jinping Zhou
There is always a mutual inhibition relationship between porosity and electrical conductivity . Rational design of hard-soft carbon to regulate the graphitization degree is an effective strategy to solve this problem. Herein, we reported an efficient method to synthesize hard-soft carbon by grafting polyaniline (PANI) onto carboxymethyl chitosan (CMC), followed by calcination with potassium oxalate. The CMC-PANI derived carbon (CPC) exhibits an interconnected framework with a high specific surface area. The graphitization degree can be controlled by the grafting ratio of PANI. The highly uniform distribution of hard-soft carbon increases the electrical conductivity which permits fast electrons/ions transfer. Benefiting from these features, CPC-3 delivers an enhanced specific capacitance of 337 F g −1 at 1 A g −1 . The CV curves of the assembled symmetric supercapacitors (SCs) have no obvious distortion even at the scan rate of 500 mV s −1 , indicating a favorable rate capability. The SCs manifest the maximum energy density of 28.72 Wh Kg −1 at a power density of 450 W kg −1 , as well as excellent cycle stability with 97.5 % capacity retention after 5000 cycles at 10 A g −1 . This work affords a new sight to prepare uniformly distributed hard-soft carbon materials for SCs with high cycle stability and rate performance.
研究领域:
材料科学
·
能源存储
✓ 已验证
产品关联
DOI
高影响因子
Advanced Energy Materials
·
2025
·
IF 26
Jian Cui,Wenxiu Li,Panpan Su,Xuefen Song,Wendong Ye,Yongguang Zhang,Zhongwei Chen
Biomass-derived hard carbon (HC), a promising anode material for sodium-ion batteries with low cost and good cycling ability, has high surface activity that easily reacts with the electrolyte, causing low initial coulombic efficiency (ICE) and poor stability. This article proposes a facile synthesis of pine wood-derived HC material with N-doped soft carbon (SC) coating strategy to improve electrochemical performance, especially for the ICE. The optimized anode material exhibits higher reversible capacity of 314.0 mAh g −1 at 30 mA·g −1 with greatly enhanced ICE of 85.2%, and high rate performance of 260.0 mAh g −1 at 5.0 C. Combined with in situ/ex situ characterizations, SC coating greatly increased closed pores that is beneficial for improving sodium storage and the anode material is explored as a adsorption-filling sodium storage behavior, favoring the high-rate performance. Density functional theory (DFT) calculations further revealed that nitrogen doping in SC greatly enhanced the sodium adsorption kinetics and provides more adsorption sites for Na + storage, increasing sodium storage capacity. This work provides in-depth insights into the surface modification of hard carbon, and offers new opportunities for the design of efficient HC anodes.
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
ChemElectroChem
·
2020
·Vol. 7
·期 19
·4010-4015
·
IF 4.154
Yanchun Xue,Mingyue Gao,Mengrong Wu,Dongqin Su,Xingmei Guo,Jing Shi,Mengting Duan,Jiale Chen,Junhao Zhang,Qinghong Kong
Graphical It's not that hard : Hard carbon-soft carbon (HC-SC) composites composed of carbon nanotubes (CNTs) blooming on porous hard carbon are synthesized and used as anodes for sodium-ion batteries with high performance. Hard carbon anodes are the most promising candidates for sodium-ion batteries due to lower sodium-embedded platform and higher specific capacity. However, pure hard carbon carbons usually show very low initial coulombic efficiency, low electronic conductance, et al . Herein, hard carbon-soft carbon (HC-SC) composites composed of carbon nanotubes (CNTs) blooming on porous hard carbon, which were synthesized through thermal decomposition of zeolitic imidazolate framework-67 (ZIF-67) and polyvinyl alcohol (PVA) composite. This unique structure could greatly promote the sodium-ion diffusion and electron transport due to the increased electrode/electrolyte contact area and enlarged pores. As expected, the HC-SC delivers a high capacity (306.8 mAh g −1 at 500 mA g −1 ), impressive cycling stability (256.8 mAh g −1 after 1000 cycles) and enhanced rate performance (144.9 mAh g −1 at 20 C), which are far superior to those of both individual hard carbon and soft carbon. This encouraging performance may benefit from the synergistic effect of the modified defect concentration and interlayer distance in hard carbon by soft carbon, as well as the unique hierarchical structure. This work provides an exemplary strategy to develop optimized carbon materials for sodium-ion batteries.
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
IONICS
·
2019
·Vol. 25
·期 3
·1235-1242
·
IF 2.289
Qiao Jia,Zhou Haitao,Liu Zhongsheng,Wen Hejing,Yang Jianhong
Al-ion batteries are proposed as promising energy storage candidates for beyond Li-ion technology due to the higher natural earth of Al metal. Recently, various graphite and graphene cathodes for Al-ion batteries have been studied in this regard, but their costs are not satisfactory. In this study, a novel cathode for Al-ion batteries is prepared by graphitizing inexpensive soft carbon materials (mesocarbon microspheres and petroleum coke) at 2800 °C. The charge and discharge process is showcased here for graphitized petroleum coke, which has a storage capacity of 77.7 mAh g −1 with two high discharge voltage (~ 2.25 and 1.80 V), higher than graphitized mesocarbon microspheres (51 mAh g −1 ). It also has excellent cycle stability and no reduction in specific capacity after 1000 cycles. Affordable cost of the graphitized petroleum coke cathode makes Al-ion battery more promising for large-scale chemical energy storage.
研究领域:
电化学储能
·
材料科学
·
能源化学
·
无机非金属材料
·
电池技术
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）