scholarly journals Cathode Properties of Na3MnPO4CO3 Prepared by the Mechanical Ball Milling Method for Na-Ion Batteries

Energies ◽  
2019 ◽  
Vol 12 (23) ◽  
pp. 4534 ◽  
Author(s):  
Baowei Xie ◽  
Ryo Sakamoto ◽  
Ayuko Kitajou ◽  
Kosuke Nakamoto ◽  
Liwei Zhao ◽  
...  
Keyword(s):  
Ball Milling ◽  
Discharge Capacity ◽  
Dimethyl Carbonate ◽  
Aqueous Electrolyte ◽  
High Current Density ◽  
Ethylene Carbonate ◽  
Initial Discharge ◽  
Milling Method ◽  
Nano Size ◽  
Mechanical Ball Milling

A novel carbonophosphate, Na3MnPO4CO3, was synthesized as a cathode material using a mechanical ball milling method with starting materials of MnCO3 and Na3PO4 without washing or drying. Duo to the formation of nano-size particles and good dispersion of the obtained Na3MnPO4CO3, the initial discharge capacity in an organic electrolyte of 1 M NaPF6/ethylene carbonate (EC): dimethyl carbonate (DMC) (1:1 v/v) was 135 mAh∙g−1 and 116 mAh∙g−1 at 1/30 C and 1/10 C, respectively. We also investigated the cathode properties of Na3MnPO4CO3 in an aqueous electrolyte of 17 m NaClO4. This is the first investigation of the electrochemical performance of Na3MnPO4CO3 with aqueous electrolyte. Na3MnPO4CO3 achieved a discharge capacity as large as 134 mAh g−1 even at a high current density of 2 mA cm−2 (0.5 C), because of the high ionic conductivity of the aqueous electrolyte of 17 m NaClO4.

Effect of Raw Materials on Properties of Coated Al2O3-Al Cermet Materials via Vacuum Sintering Method

2020 ◽  
Vol 858 ◽  
pp. 53-58
Author(s):  
Ai Xia Chen ◽  
Chao Yang ◽  
Rui Hua Wang ◽  
Fang Wang ◽  
Ming Han Xu ◽  
...  
Keyword(s):  
Ball Milling ◽  
Raw Materials ◽  
Surface Hardness ◽  
Chemical Precipitation ◽  
Chemical Precipitation Method ◽  
Precipitation Method ◽  
Cermet Material ◽  
Milling Method ◽  
Cermet Materials ◽  
Mechanical Ball Milling

In this paper, the effect of raw materaisl on the properties of coated Al2O3/Al cermet materials were investigated, the raw materials were prepared via different methods, which provide a reference for obtaining higher performance cermet materials. Through mixing, molding, sintering, sample preparation, scanning electron microscopic observation, energy spectrometer observation and analysis, the following conclusions can be drawn, the density of the cermet material prepared by the mechanical ball milling method (83.5%) is higher than that of the cermet material prepared by the chemical precipitation method (92.8%). It is nearly 10% lower. The alumina particles prepared by the ball milling method are agglomerated, and a large amount of agglomeration occurs in the aluminum, and the composition is very uneven. For materials prepared by the precipitation method, the aluminum oxide is uniformly distributed in the aluminum. The ball-milling powder is used to prepare materials, most of the alumina is in the form of particles, and in the precipitation method. In the powder preparation sample, the thin layer of alumina which forms the same eggshell envelops the aluminum, and the aluminum has a certain liquid phase change. the surface hardness (824HV) of the cermet material prepared by the mechanical ball milling method is lower than the surface hardness (1005HV) of the cermet material prepared by the chemical precipitation method.

scholarly journals Preparation of a superfine RDX/Al composite as an energetic material by mechanical ball-milling method and the study of its thermal properties

RSC Advances ◽  
2018 ◽  
Vol 8 (66) ◽  
pp. 38047-38055 ◽  
Author(s):  
Lei Xiao ◽  
Yan Zhang ◽  
Xiaohong Wang ◽  
Gazi Hao ◽  
Jie Liu ◽  
...  
Keyword(s):  
Thermal Properties ◽  
Ball Milling ◽  
Energetic Material ◽  
Mass Ratio ◽  
Al Composite ◽  
Milling Method ◽  
Mechanical Ball Milling

To research the influence of aluminum (Al) on the decomposition of 1,3,5-trimethylene trinitramine (RDX), superfine RDX/Al composite with a mass ratio of 70/30 was prepared by mechanical ball milling.

scholarly journals Ultrafast Synthesis of Ni-MOF in One Minute by Ball Milling

Nanomaterials ◽  
2018 ◽  
Vol 8 (12) ◽  
pp. 1067 ◽  
Author(s):  
Ren Zhang ◽  
Cheng-An Tao ◽  
Rui Chen ◽  
Lifang Wu ◽  
Xiaoxuan Zou ◽  
...  
Keyword(s):  
Ball Milling ◽  
Milling Time ◽  
Metal Organic Framework ◽  
Crystal Water ◽  
High Capacitance ◽  
Highly Efficient ◽  
Milling Method ◽  
Metal Organic ◽  
Preliminary Preparation ◽  
Mechanical Ball Milling

A mechanical ball milling method for ultrafast synthesis of a nickel-based metal organic framework (Ni-MOF) has been proposed. The Ni-MOF was successfully synthesized in merely one minute without any solvent, additives, or preliminary preparation. The effect of milling time, mechano-frequency, type of assistant liquid, and amount of assistant water were systematically explored. It was found that the product can be obtained even only at a mechano-frequency of 10 Hz within one minute without any external solvent-assist, which indicated that the crystal water present in the nickel precursor was sufficient to promote MOF formation. Increasing the milling time, raising the mechano-frequency, and the addition of assistant solvent could promote the reaction and increase the yield. The method is rapid, highly efficient, eco-friendly, and has great scalability. The product generated within merely one minute even exhibited high capacitance.

Effects of Ball Milling on the Electrochemical Performance of Li2FeSiO4 Cathode

2014 ◽  
Vol 879 ◽  
pp. 16-20 ◽  
Author(s):  
Asmalina Mokhtar ◽  
Mohamad Izha Ishak ◽  
Siti Munirah Hasanaly
Keyword(s):  
Electrochemical Performance ◽  
Cathode Material ◽  
Ball Milling ◽  
Discharge Capacity ◽  
Morphological Changes ◽  
Solid State Reaction Method ◽  
High Energy ◽  
Heat Treated ◽  
Milling Method ◽  
Milling Duration

The Li2FeSiO4cathode materialwas prepared via a solid state reaction method and subsequently heat treated at around 350°C and 700OC in Ar2atmosphere. High energy ball milling method is applied on the resulting powder with carbon additives to further modify the structure and to enhance the electrochemical performance. The structure and morphology of the prepared Li2FeSiO4powder was characterized by means of X-Ray Diffractometry (XRD) and Field-Emission Scanning Electron Microscope (FESEM). The morphological changes of the Li2FeSiO4resultedfrom different ball milling duration strongly influences the electrochemical performance of this cathode material.The Li2FeSiO4powder which was ball-milled for 48h delivered in the best electrochemical performance with a discharge capacity of 65.4 mAh/g when cycled between 1.5 and 4.8V vs. Li/Li+. Particulate morphology observed from FESEM images showed that samples that were ball-milled for 48h have reduced agglomeration compared to that ball-milled for 24h. The larger surface area for reaction with Li+improves the discharge capacity of the Li2FeSiO4cathode material.

scholarly journals Cathode Properties of Na3FePO4CO3 Prepared by the Mechanical Ball Milling Method for Na-ion Batteries

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Baowei Xie ◽  
Ryo Sakamoto ◽  
Ayuko Kitajou ◽  
Kosuke Nakamoto ◽  
Liwei Zhao ◽  
...  
Keyword(s):  
Ball Milling ◽  
Milling Method ◽  
Mechanical Ball Milling

scholarly journals Preparation and Characterization of Nano-CL-20/TNT Cocrystal Explosives by Mechanical Ball-Milling Method

ACS Omega ◽  
2020 ◽  
Vol 5 (28) ◽  
pp. 17761-17766
Author(s):  
Yubing Hu ◽  
Shuo Yuan ◽  
Xiaojiang Li ◽  
Meng Liu ◽  
Fengxi Sun ◽  
...  
Keyword(s):  
Ball Milling ◽  
Milling Method ◽  
Mechanical Ball Milling

A promising mechanical ball-milling method to synthesize carbon-coated Co9S8 nanoparticles as high-performance electrode for supercapacitor

2017 ◽  
Vol 52 (23) ◽  
pp. 13552-13560 ◽  
Author(s):  
Xudong Liu ◽  
Qidong Li ◽  
Yanming Zhao ◽  
Youzhong Dong ◽  
Qinghua Fan ◽  
...  
Keyword(s):  
Ball Milling ◽  
High Performance ◽  
Carbon Coated ◽  
Milling Method ◽  
Mechanical Ball Milling
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