scholarly journals Na-mobility in P2-Na0.5MgxNi0.17-xMn0.83O2 (0 ≤ x ≤ 0.07) from electrochemical and muon-spin relaxation studies

2021 ◽  
Author(s):  
Le Anh Ma ◽  
Rasmus Palm ◽  
Elisabetta Nocerino ◽  
Ola Kenji Forslund ◽  
Nami Matsubara ◽  
...  
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Spin Relaxation ◽  
Layered Structure ◽  
Transition Metal Oxides ◽  
Cathode Materials ◽  
Muon Spin ◽  
Muon Spin Relaxation ◽  
Relaxation Studies

Sodium transition metal oxides with a layered structure are one of the most widely studied cathode materials for a Na+-ion battery. Since the mobility of Na+ in such cathode materials...

scholarly journals Tuning local chemistry of P2 layered-oxide cathode for high energy and long cycles of sodium-ion battery

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Chenchen Wang ◽  
Luojia Liu ◽  
Shuo Zhao ◽  
Yanchen Liu ◽  
Yubo Yang ◽  
...  
Keyword(s):  
Phase Transition ◽  
Transition Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Cathode Materials ◽  
Specific Capacity ◽  
High Energy ◽  
Sodium Ion ◽  
Sodium Ion Batteries ◽  
Two Phase

AbstractLayered transition-metal oxides have attracted intensive interest for cathode materials of sodium-ion batteries. However, they are hindered by the limited capacity and inferior phase transition due to the gliding of transition-metal layers upon Na+ extraction and insertion in the cathode materials. Here, we report that the large-sized K+ is riveted in the prismatic Na+ sites of P2-Na0.612K0.056MnO2 to enable more thermodynamically favorable Na+ vacancies. The Mn-O bonds are reinforced to reduce phase transition during charge and discharge. 0.901 Na+ per formula are reversibly extracted and inserted, in which only the two-phase transition of P2 ↔ P’2 occurs at low voltages. It exhibits the highest specific capacity of 240.5 mAh g−1 and energy density of 654 Wh kg−1 based on the redox of Mn3+/Mn4+, and a capacity retention of 98.2% after 100 cycles. This investigation will shed lights on the tuneable chemical environments of transition-metal oxides for advanced cathode materials and promote the development of sodium-ion batteries.

scholarly journals Muon spin relaxation studies on magnetic properties of organic conductors Pd(dmit)2salts and α-(BETS)2I3

2010 ◽  
Vol 225 ◽  
pp. 012041 ◽  
Author(s):  
S Ohira-Kawamura ◽  
M Tamura ◽  
R Kato ◽  
K Hiraki ◽  
T Takahashi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Spin Relaxation ◽  
Muon Spin ◽  
Organic Conductors ◽  
Muon Spin Relaxation ◽  
Relaxation Studies

Comment on “Muon Spin Relaxation Studies of Zn-Substitution Effects in High-TcCuprate Superconductors”

1998 ◽  
Vol 80 (1) ◽  
pp. 205-205 ◽  
Author(s):  
C. Bernhard ◽  
J. L. Tallon ◽  
C. Bucci ◽  
R. DeRenzi ◽  
G. Guidi ◽  
...  
Keyword(s):  
Spin Relaxation ◽  
Muon Spin ◽  
Muon Spin Relaxation ◽  
Substitution Effects ◽  
Zn Substitution ◽  
Relaxation Studies
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