Li-substituted layered spinel cathode materials for sodium ion batteries

Patent · Tue Nov 02 00:00:00 EDT 2021

OSTI ID:1860033

Xiong, Hui; Deng, Changjian; Xu, Jing

Systems, methods, and compositions are disclosed for a Li-substituted layered-tunneled O3/spinel Na(NixFeyMnz)O2 cathode material, Na0.87Li0.25Ni0.4Fe0.2Mn0.4O2+∂ (LS-NFM) for enhanced sodium ion storage and cycling stability. The LS-NFM electrode is prepared by adjusting the stoichiometric ratio of the Na ion over the sum of Li and transition metal ions below 1. The Rietveld refinement of XRD data indicates that the cathode is composed of 94% layered and 6% spinel components. When cycled at a high current density of 100 mA g−1, LS-NFM cathode exhibited a first-cycle Coulombic efficiency of 88% and reversible discharge capacity of 107 mAh g−1 after 50 cycles with the capacity retention of 95%.

• Research Organization: Boise State Univ., ID (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: SC0019121
• Assignee: Boise State University (Boise, ID)
• Patent Number(s): 11,165,064
• Application Number: 16/594,235
• OSTI ID: 1860033
• Resource Relation: Patent File Date: 10/07/2019
• Country of Publication: United States
• Language: English