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Title:
FULL CELL FOR LITHIUM ION BATTERY WITH CONVERSION ANODE AND INTERCALATION CATHODE
Document Type and Number:
WIPO Patent Application WO/2018/029707
Kind Code:
A4
Abstract:
Embodiments herein provide a full cell with porous iron oxide (Fe2O3) nanostructures, synthesized using polyol method, as anode, and powder Lithium Cobalt Oxide (LiCoO2) as cathode. The full cell includes an electrolyte and a separator. The half cell performance of the Fe2O3 exhibits a reversible capacity of 903mAh/g at a current (C) rate of 1C vs. Li metal. The LiCoO2 (LCO) is having a capacity of 131mAh/g at 1C after 50 cycles vs. Li metal. The full cell is prepared using Fe2O3 anode and LiCoO2 cathode, and the mass loadings are adjusted such that the necessity of pre- activation is prevented. The LCO-Fe2O3 full cell is having capacity retention of 91% after 100 charge-discharge cycles at 1C. The capacity based on the anode mass is approximately 800mAh/g after 100 cycles. The prepared full cell is having a high capability at C rates in the range of 2C- 5C.

Inventors:
MITRA SAGAR (IN)
VELURI PAVAN SRINIVAS (IN)
Application Number:
PCT/IN2017/050335
Publication Date:
August 09, 2018
Filing Date:
August 09, 2017
Export Citation:
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Assignee:
INDIAN INST TECHNOLOGY BOMBAY (IN)
International Classes:
H01M4/52; H01M4/26; H01M8/08; H01M8/083
Attorney, Agent or Firm:
NARASANI, Arun Kishore (IN)
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Claims:
AMENDED CLAIMS

received by the International Bureau on 07 May 2018 (07.05.2018)

We claim:

1. (Amended) A full cell comprising:

a porous ferric oxide (Fe203) nanostructure anode synthesized using polyol method;

a powdered lithium cobalt oxide (LiCo02) cathode;

an electrolyte; and

a separator.

2. (Amended) The full cell of claim 1, wherein capacity of the full cell at a current rate of 0.5C is 920mAh/g based on anode (Fe203) mass loading.

3. (Amended) The full cell of claim 1, wherein capacity of the full cell at a current rate of 1C is 800mAh/g based on anode (Fe203) mass loading.

4. (Amended) The full cell of claim 1, wherein capacity of the full cell at a current rate of 2C is 670mAh/g based on anode (Fe203) mass loading.

5. (Amended) The full cell of claim 1, wherein capacity of the full cell at a current rate of 5C is 450mAh/g based on anode (Fe203) mass loading.

6. (Original) The full cell of claim 1, wherein the capacity retention rate of the full cell is 91% post 100 charge-discharge cycles at a current rate of 1C.

7. (Original) A method of preparing a full cell, the method comprising: preparing porous ferric oxide (Fe203) nanostructure anode; preparing porous ferric oxide (Fe203) nanostructure electrode;

preparing powdered lithium cobalt oxide (LiCo02) electrode;

preparing an electrolyte; and

soaking a separator in an electrolyte, wherein the soaked separator is placed on a cathode foil and an anode is placed on top of the soaked separator and sealed in a 2016 coin type cell.

8. (Original) The method of claim 7, wherein the separator is placed between the prepared porous Fe203 nanostructure electrode and prepared powdered LiCo02 electrode.

9. (Original) The method of claim 7, wherein capacity of the LiCo02 cathode is adjusted for countering irreversible loss of the Fe203 anode.

10. (Original) The method of claim 7, wherein capacity of the full cell is retained in the range of 0.5C to 5C.



 
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