scholarly journals A Spinel (FeNiCrMnMgAl)3O4 High Entropy Oxide as a Cycling Stable Anode Material for Li-Ion Batteries

Processes ◽  
2021 ◽  
Vol 10 (1) ◽  
pp. 49
Author(s):  
Yu Zheng ◽  
Xin Wu ◽  
Xuexia Lan ◽  
Renzong Hu
Keyword(s):  
Phase Change ◽  
Ball Milling ◽  
Rock Salt ◽  
Synthesis Method ◽  
High Energy ◽  
Ex Situ ◽  
Lithium Storage ◽  
High Entropy ◽  
Change Behavior ◽  
Salt Phase

Recently, high entropy oxides (HEO) with special stabilization effects have been widely investigated as new anode materials for lithium-ion batteries. However, the lithium storage mechanism of HEO is still under debate. In this work, we applied a modified solution combustion synthesis method with a subsequent ball milling refinement process to prepare a six-component (FeNiCrMnMgAl)3O4 spinel high entropy oxide (6-SHEO). The novel 6-SHEO anode features outstanding electrochemical performance, enabling a stable capacity of 657 mAh g−1 at a current rate of 0.2 A g−1 after 200 cycles, and good high-rate capability with 350 mAh g−1 even at 4 A g−1. In addition, the lithium storage behavior of this 6-SHEO anode was explored in detail through in-situ XRD and ex-situ TEM approaches. Surprisingly, a reversible spinel to rock salt phase transition behavior and spinel phase residue phenomenon was firstly observed by this route. Furthermore, for better understanding of the phase change behavior in this 6-SHEO anode, a high-energy ball milling approach was applied to induce a similar spinel to rock salt phase transformation for the first time, which generates fresh insight into the mechanism of the phase change behavior in this 6-SHEO anode.

scholarly journals Refractory High-Entropy HfTaTiNbZr-Based Alloys by Combined Use of Ball Milling and Spark Plasma Sintering: Effect of Milling Intensity

Metals ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1268 ◽  
Author(s):  
Natalia Shkodich ◽  
Alexey Sedegov ◽  
Kirill Kuskov ◽  
Sergey Busurin ◽  
Yury Scheck ◽  
...  
Keyword(s):  
Solid Solution ◽  
Ball Milling ◽  
Spark Plasma Sintering ◽  
Vickers Hardness ◽  
High Energy ◽  
High Entropy Alloy ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball

For the first time, a powder of refractory body-centered cubic (bcc) HfTaTiNbZr-based high-entropy alloy (RHEA) was prepared by short-term (90 min) high-energy ball milling (HEBM) followed by spark plasma sintering (SPS) at 1300 °C for 10 min and the resultant bulk material was characterized by XRD and SEM/EDX. The material showed ultra-high Vickers hardness (10.7 GPa) and a density of 9.87 ± 0.18 g/cm³ (98.7%). Our alloy was found to consist of HfZrTiTaNb-based solid solution with bcc structure as a main phase, a hexagonal closest packed (hcp) Hf/Zr-based solid solution, and Me2Fe phases (Me = Hf, Zr) as minor admixtures. Principal elements of the HEA phase were uniformly distributed over the bulk of HfTaTiNbZr-based alloy. Similar alloys synthesized without milling or in the case of low-energy ball milling (LEBM, 10 h) consisted of a bcc HEA and a Hf/Zr-rich hcp solid solution; in this case, the Vickers hardness of such alloys was found to have a value of 6.4 GPa and 5.8 GPa, respectively.

scholarly journals A new spinel high-entropy oxide (Mg0.2Ti0.2Zn0.2Cu0.2Fe0.2)3O4 with fast reaction kinetics and excellent stability as an anode material for lithium ion batteries

RSC Advances ◽  
2020 ◽  
Vol 10 (16) ◽  
pp. 9736-9744 ◽  
Author(s):  
Hong Chen ◽  
Nan Qiu ◽  
Baozhen Wu ◽  
Zhaoming Yang ◽  
Sen Sun ◽  
...  
Keyword(s):  
Lithium Ion ◽  
Solid State Reaction Method ◽  
High Energy ◽  
Lithium Storage ◽  
Fast Reaction ◽  
High Entropy ◽  
One Step ◽  
Energy Ball ◽  
Storage Properties ◽  
Excellent Stability

Here we present novel (Mg0.2Ti0.2Zn0.2Cu0.2Fe0.2)3O4 materials prepared via one-step solid state reaction method and subsequently high-energy ball-milling. When used as anodes for LIBs, it exhibits superior lithium storage properties.

Unveiling inherent functions of rock-salt phase character and multi-dimensional structural engineering of NiCoO2 anode for high-power and long-life lithium ion batteries

2021 ◽  
Author(s):  
Sheng Chen ◽  
Wei Wei ◽  
Tianyi Ding ◽  
Yunping Wu ◽  
Rui Zhai ◽  
...  
Keyword(s):  
Lithium Ion Batteries ◽  
Rock Salt ◽  
Structural Engineering ◽  
Storage Capacity ◽  
Lithium Ion ◽  
Redox Activity ◽  
Rock Salt Structure ◽  
Lithium Storage ◽  
Salt Structure ◽  
Salt Phase

NiCoO2 (NCO) with desirable redox activity, high lithium storage capacity and distinct rock-salt structure has gained increasing attention toward application in next-generation lithium ion batteries (LIBs) in comparison with other...

Facile scalable synthesis and superior lithium storage performance of ball-milled MoS2–graphite nanocomposites

2015 ◽  
Vol 3 (19) ◽  
pp. 10466-10470 ◽  
Author(s):  
Haihua Zhao ◽  
Hong Zeng ◽  
Ying Wu ◽  
Shengen Zhang ◽  
Bo Li ◽  
...  
Keyword(s):  
Ball Milling ◽  
Mass Production ◽  
High Energy ◽  
High Energy Ball Milling ◽  
Lithium Storage ◽  
Storage Performance ◽  
Milling Method ◽  
Energy Ball ◽  
Scalable Synthesis ◽  
Graphite Nanocomposites

A facile high-energy ball-milling method is developed to synthesize MoS2–graphite (MoS2–C) nanocomposites, which can be used for scalable industrial mass production.

Structural Features of High-Entropy HfTaTiNbZr Alloy Fabricated by High-Energy Ball Milling

2020 ◽  
Vol 61 (4) ◽  
pp. 421-428
Author(s):  
A. S. Sedegov ◽  
V. S. Tsybulin ◽  
K. V. Kuskov ◽  
N. F. Shkodich ◽  
D. O. Moskovskikh
Keyword(s):  
Ball Milling ◽  
High Energy ◽  
Structural Features ◽  
High Energy Ball Milling ◽  
High Entropy ◽  
Energy Ball

High-entropy (HfTaTiNbZr)C and (HfTaTiNbMo)C carbides fabricated through reactive high-energy ball milling and spark plasma sintering

2020 ◽  
Vol 46 (11) ◽  
pp. 19008-19014
Author(s):  
D.O. Moskovskikh ◽  
S. Vorotilo ◽  
A.S. Sedegov ◽  
K.V. Kuskov ◽  
K.V. Bardasova ◽  
...  
Keyword(s):  
Ball Milling ◽  
Spark Plasma Sintering ◽  
High Energy ◽  
High Energy Ball Milling ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball

scholarly journals High-Energy Ball Milling and Spark Plasma Sintering of the CoCrFeNiAl High-Entropy Alloy

Metals ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 1489
Author(s):  
Alexander S. Rogachev ◽  
Nicholas A. Kochetov ◽  
Anna V. Panteleeva ◽  
Kirill V. Kuskov ◽  
Dmitry Yu. Kovalev ◽  
...  
Keyword(s):  
Ball Milling ◽  
Spark Plasma Sintering ◽  
High Energy ◽  
High Energy Ball Milling ◽  
High Entropy Alloy ◽  
X Rays ◽  
High Entropy ◽  
Plasma Sintering ◽  
Spark Plasma ◽  
Energy Ball

Nanocrystalline powder of the CoCrFeNiAl high-entropy alloy was produced by high-energy ball milling (HEBM) and consolidated by spark plasma sintering (SPS). Microstructure and crystal structure transformations occurring in the course of HEBM and SPS processes were explored by Scanning Electron Microscopy (SEM), Energy Dispersive Spectroscopy (EDS) and X-Rays Diffraction (XRD) methods. Synthesized materials showed a microhardness of 4000–6000 MPa and electrical resistivity of 0.2 mΩ⋅cm at room temperature.

Sign in / Sign up

Export Citation Format

Share Document