Tuning the transition metal oxides towards achieving water-stability and high voltage electrochemical stability, as cathode materials for alkali metal-ion batteries

2021 ◽  
Author(s):  
Bachu S. Kumar ◽  
Anagha Pradeep ◽  
Amartya Mukhopadhyay
Keyword(s):  
Transition Metal ◽  
Alkali Metal ◽  
Metal Oxides ◽  
High Voltage ◽  
Transition Metal Oxides ◽  
Cathode Materials ◽  
Metal Ion ◽  
Electrochemical Stability ◽  
Water Stability ◽  
Alkali Metal Ion

Water-stable O3-type layered Na transition metal oxides enabling environment friendly ‘aqueous processing’ of electrodes with long-term electrochemical stability

2020 ◽  
Vol 8 (35) ◽  
pp. 18064-18078 ◽  
Author(s):  
Bachu Sravan Kumar ◽  
Anagha Pradeep ◽  
Animesh Dutta ◽  
Amartya Mukhopadhyay
Keyword(s):  
Alkali Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Metal Ion ◽  
Electrochemical Stability ◽  
Slab Thickness ◽  
Water Stability ◽  
Aqueous Processing ◽  
Environment Friendly

Tuning the TM-ion ‘slab thickness’ and alkali metal-ion ‘inter-slab spacing’ of Na-TM-oxides in opposite terms (and also suppressing TM-dissolution in electrolyte) leads to outstanding air/water-stability and long-term electrochemical stability.

Opportunities in Na/K [Hexacyanoferrate] Frameworks for Sustainable Non-aqueous Na+/K+ batteries

2022 ◽  
Author(s):  
Ashwani Tyagi ◽  
Nagmani . ◽  
Sreeraj Puravankara
Keyword(s):  
Transition Metal ◽  
Alkali Metal ◽  
Metal Oxides ◽  
Transition Metal Oxides ◽  
Cathode Materials ◽  
The Past ◽  
Nasicon Type

In the past decade, the most sought cathode materials for SIBs and PIBs include transition metal oxides (TMOs), polyanionic phosphates and fluoro phosphates, NASICON-type polyanionic compounds, and alkali metal hexacyanoferrates...

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.

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