Patent ID: 11901122
Assignee: SPEL TECHNOLOGIES PRIVATE LIMITED
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method of making a hybrid lithium-ion battery-capacitor H-LIBC, comprising the steps of:
preparing a hybrid composite cathode by the steps of:
providing a lithium ion battery (LIB) active material comprising a lithium metal oxide, a lithium ion capacitor (LIC) active material comprising at least one selected from the group of activated carbon and carbon black, and a binder as dry powders;
mixing the LIC active material, the LIB active material, and the binder to create a homogenous cathode dry powder mixture;
pressing the cathode dry powder to produce a free-standing cathode film;
laminating the cathode film onto a current collector;
preparing an anode by the steps of:
providing an anode active material having a surface, and a thin Li film source;
pre-positioning and pressing the Li film source on the surface of the anode active material, wherein the mass of the Li film source is calculated by the equation:, m
   
    L
    ⁢
    i
   
  
  =
  
   
    
     x
     ⁢
     
      m
      A
     
     ⁢
     
      c
      
       A
       ⁢
       1
      
     
    
    -
    
     
      m
      B
     
     ⁢
     
      c
      B
     
    
    -
    
     
      
       m
       c
      
      ⁢
      
       
        c
        c
       
       (
       
        
         V
         max
        
        -
        
         V
         
          c
          -
          OCV
         
        
       
       )
      
     
     3.6
    
   
   
    c
    
     L
     ⁢
     i, where mLi is the Li source mass to be pre-lithiated on the surface of the anode (g), cLi is the specific capacity of lithium and is 3,860 mAh/g, mA is the anode active layer weight (g), mB is the Li-ion battery (LIB) active material weight (g), mC is the Li-ion capacitor (LIC) active material weight (g), cA1 is the first lithium intercalation (1st discharge) specific capacity (mAh/g) of the anode electrode, cB is the specific capacity (mAh/g) of the LIB active material, cC is the specific capacitance (F/g) of the LIC active material layer, Vmax is the maximum operating voltage of H-LIBC, Vc-OCV is the open-circuit voltage of LIC activated material is from 2.5 V to 3.2 V, and x is between 0.5 to 1.0
providing a separator;
providing an electrolytic solution comprising a lithium salt electrolyte;
combining the hybrid composite cathode, the pre-lithiated anode, the separator and the electrolyte to form a H-LIBC energy storage device;
and wherein the capacity ratio γC:A of the hybrid composite cathode electrode to the anode electrode is from 0.14 to 0.95, and the specific surface area of the LIC active material is greater than 1,000 m2/g.