Reversing the Irreversible: Thermodynamic Stabilization of LiAlH4 Nanoconfined Within a Nitrogen-Doped Carbon Host

ACS Nano ◽  
2021 ◽  
Author(s):  
YongJun Cho ◽  
Sichi Li ◽  
Jonathan L. Snider ◽  
Maxwell A. T. Marple ◽  
Nicholas A. Strange ◽  
...  
Keyword(s):  
Irreversible Thermodynamic ◽  
Nitrogen Doped ◽  
Thermodynamic Stabilization ◽  
Nitrogen Doped Carbon

scholarly journals Reversing the Irreversible: Thermodynamic Stabilization of Lithium Aluminum Hydride Nanoconfined Within a Nitrogen-Doped Carbon Host

2021 ◽  
Author(s):  
YongJun Cho ◽  
Sichi Li ◽  
Jonathan Snider ◽  
Maxwell Marple ◽  
Nicholas Strange ◽  
...  
Keyword(s):  
Theoretical Calculations ◽  
High Capacity ◽  
Aluminum Hydride ◽  
Irreversible Thermodynamic ◽  
Lithium Aluminum ◽  
New Approach ◽  
Lack Of Control ◽  
Thermodynamic Stabilization ◽  
The Stability ◽  
Nitrogen Doped Carbon

Abstract A general problem when designing functional nanomaterials for energy storage is the lack of control over the stability and reactivity of metastable phases. Using the high-capacity hydrogen storage candidate LiAlH4 as an exemplar, we demonstrate a new approach to thermodynamic stabilization of metastable metal hydrides by coordination to nitrogen binding sites within the nanopores of N-doped CMK-3 carbon (NCMK-3). The resulting LiAlH4@NCMK-3 material releases H2 at temperatures as low as 126 °C with full decomposition below 240 °C, bypassing the usual Li3AlH6 intermediate. Moreover, >80% of LiAlH4 can be regenerated under 100 MPa H2, a feat previously thought to be impossible. The nitrogen sites lower the energy barrier for regenerating the hydride by changing the density of states in the vicinity of the Fermi level, effectively acting as solvation sites for lithium ions. Theoretical calculations provide a rationale for the unprecedented solid-state reversibility, which derives from the combined effects of nanoconfinement, Li adatom formation, and charge redistribution between the metal hydride and the host.

A novel approach for preparing in-situ nitrogen doped carbon via pyrolysis of bean pulp for supercapacitors

Energy ◽  
2021 ◽  
Vol 216 ◽  
pp. 119227
Author(s):  
Yan Ding ◽  
Yunchao Li ◽  
Yujie Dai ◽  
Xinhong Han ◽  
Bo Xing ◽  
...  
Keyword(s):  
Nitrogen Doped ◽  
Novel Approach ◽  
Nitrogen Doped Carbon

Nitrogen-doped carbon with high graphitic-N exposure for electroreduction of CO2 to CO

Ionics ◽  
2021 ◽  
Author(s):  
Ziyang Shu ◽  
Guanying Ye ◽  
Jue Wang ◽  
Suqin Liu ◽  
Zhen He ◽  
...  
Keyword(s):  
Nitrogen Doped ◽  
Nitrogen Doped Carbon
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