Lithium ion secondary battery

• US 5,882,821 A
• Filed: 02/24/1997
• Issued: 03/16/1999
• Est. Priority Date: 02/23/1996
• Status: Expired due to Fees

• Current Assignee: UBE Industries Limited (UBE Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Miyasaka, Tsutomu
• Primary Examiner(s): KALAFUT, STEPHEN J
• Application Number:
  US08/805,058
• Time in Patent Office: 750 Days
• Field of Search: 429/224, 429/218, 429/221, 423/599, 205/59
• US Class Current: 429/224
• CPC Class Codes: C01G 45/1242 of the type [Mn2O4]-, e.g. LiMn2O4, Li[MxMn2-x]O4
• CPC Class Codes: C01G 49/0072 containing manganese
• CPC Class Codes: C01G 51/54 of the type [Mn2O4]-, e.g. Li(CoxMn2-x)04, Li(MyCoxMn2-x-y)O4
• CPC Class Codes: C01G 53/54 of the type [Mn2O4]-, e.g. Li(NixMn2-x)O4, Li(MyNixMn2-x-y)O4
• CPC Class Codes: C01P 2002/54 one element only
• CPC Class Codes: C01P 2006/40 Electric properties
• CPC Class Codes: H01M 10/0525 Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
• CPC Class Codes: H01M 10/0587 of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
• CPC Class Codes: H01M 4/131 Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
• CPC Class Codes: H01M 4/136 Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
• CPC Class Codes: H01M 4/485 of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy H01M4/505, H01M4/525 take precedence
• CPC Class Codes: H01M 4/505 of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
• CPC Class Codes: H01M 4/5825 Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product

Abstract

In a lithium ion secondary battery having a positive electrode, a negative electrode, a non-aqueous electrolyte, and a container sealing the electrodes and electrolyte therein, the positive electrode is formed of a positive electrode active material which is produced by electrochemically intercalating a lithium ion into a lithium manganese-metal complex oxide in the container to give a positive electrode active material precursor comprising a lithium manganese-metal complex oxide of which lithium ion content is increased, and then releasing a lithium ion from the positive electrode active material precursor in the container, and the negative electrode is formed of a negative electrode active material which is produced by intercalating the released lithium ion into a negative electrode active material precursor of a metal oxide in the container.

Claims

1. A process for preparing a lithium ion secondary battery which comprises electrically charging a non-aqueous secondary battery precursor comprising a positive electrode active material precursor of the formula (II):

space="preserve" listing-type="equation">Li.sub.l+x Mn.sub.2-a M.sub.a/c O.sub.4+b (II)

wherein M is a cation of a transition metal selected from the group consisting of Co, Ni, Fe, Cr, Cu, Ti, Zr, Nb and Y;

x, a and b are numbers satisfying the conditions of 0.3<

x<

1.2, 0<

a≦

1.0, and 0≦

b<

0.4, respectively; and

c is a number of 1 to 4, a negative electrode active material precursor, a non-aqueous electrolyte, and a container sealing the electrode precursors and electrolyte therein, to convert the positive electrode active material precursor into a positive electrode active material of the formula (I);

space="preserve" listing-type="equation">Li.sub.y Mn.sub.2-a M.sub.a/c O.sub.4+b (I)

wherein M, a, b and c are the same as above, and y is a number satisfying the condition of 0<

y≦

1.0, and the negative electrode active material precursor into a negative electrode active material having a lithium ion inserted therein.

2. The process of claim 1, wherein the negative electrode active material precursor contains essentially no lithium.

3. The process of claim 1, wherein the negative electrode active material precursor comprises an amorphous metal complex oxide.

4. The process of claim 1, wherein y in the formula (I) is under condition of 0<

y≦

0.9.