動力鋰離子電池正極材料的研究評述

1、 38 9 V ol.38, No.92009 9RARE METAL MATERIALS AND ENGINEERINGSeptember 20092008-09-221979 2430020555-2311807, E-mail:tfyihit163.cm11 1 12(1. 243002 (2. 150001LiMn 2O 4 Li M PO 4 LiMn 2O 4 Li M PO 4LiMn 2O 4 Li M PO 4 Li 3V 2(PO4 3LiMn 2O 4LiFePO 4Li 3V 2(PO4 3TM 912.9 A1002-185X(200909-1687-06 <1

2、 c (LiCoO2 (LiCox Ni y Mn z O 2 (LiMn2O 4 (LiM PO 4 LiCoO 2 1/2LiCoO 2Li + LiCoO 20.5Li+ Li 0.5CoO 2( LiCoO 2Li + Li + Li + X X LiMn 2O 4 Li + LiMn 2O 4Li + +e-+2MnO2 Li +LiMn 2O 4 LiMnO 2 14 2 25 g 1688g 38 LiMn 2O 4 LiFePO 4 2LiMn 2O 4 LiFePO 4Li 3V 2(PO4 3 LiFePO 4 6 10%+5%PVDF 85 % (LiFePO4 3 &#

3、215;10-3S·cm-1 LiCoO 2 LiMn 2O 4 : LiMn 2O 4 LiFePO 4 4Table 1 Oxidative exothermic temperature of the main four kinds of cathode materials2LiCo x Ni y Mn z O 2180LiMn 2O 4250 Table 2 Comparison of several kinds of cathode materials for lithium ion battery 25Theoretical capacity / mAh·g-12

4、74 275 148 170 332 (x =5 197 (x =3 Actual capacity /mAh·g-1130150 150220 110130 135153 120150(x =3 High rate discharge performance Good - Good Good Good Electric conductivity / S·cm-110-3- 10-510-910-7LiMn 2O 4 Jahn-Teller 55 Mn 3+ Mn 2+ LiMn 2O 4 LiMn 2O 4 7 8Pechini Pechini 9 - 10 11 12&

5、#169; 13 14 15X 16 17 LiMn 2O 4 - Pechini K K Li Mn © K X / Ni Mn K LiMn 2O 4 LiMn 2O 4 9 g 1689gL Jahn-Teller LiMn 2O 4 3(1 Mn Jahn-Teller Li +Mg 2+Zn 2+ 18(2 Mn Cr 3+Co 3+Ni 2+ Mn M-O Mn-O 5 V 19(3 Mn Al 3+Ga 3+ 8 a Li + 20Li M PO 4LiFePO 4 (LiFePO4 170 mAh·g-1 3.5 V LiCoO 2LiNiO 2 LiMn

6、2O 4 LiFePO 4 LiFePO 4 21 22 23 24 - 25 26 - © Fe 3+ Fe 2+ LiFePO 4 LiFePO 4 3.1.1 LiFePO 4 LiFePO 4 LiFePO 4 Li + LiFePO 4 273.1.2 LiFePO 4K LiFePO 4 K (<200 nm 283.1.3 LiFePO 4 K K K 29 Li 3V 2(PO4 3Li 3V 2(PO4 3 LiCoO 2 Li 3V 2(PO4 3 LiCoO 2LiMn 2O 4LiFePO 4 Li 3V 2(PO4 3 Li + 30 Li 3V 2(

7、PO4 3 LiFePO 4 31Li 3V 2(PO4 3 32 Li 3V 2(PO4 3 g 1690g 38Li 3V 2(PO4 3 Li 3V 2(PO4 3PO 4 VO 6* VO 6 6PO 4 PO 4 4VO 6 (VO6 2(PO4 3 Li 3V 2(PO4 3 Li 3V 2(PO4 3 PO 43- Li 3V 2(PO4 3 Li 3V 2(PO4 3VO 6 PO 4 * V-O-P VO 6 PO 4 Li 3V 2(PO4 3 10-7 S·cm-1 33 LiCoO 2 LiMn 2O 4Li 3V 2(PO4 3V 4 5 332 mAh&#

8、183;g-1Li 3V 2(PO4 3 - c K H 2 H 2 Ê 31,34 H 2 C C C C H 2 35 - © 36 37Li 3V 2(PO4 3 VO 6 Li 3V 2(PO4 3 Li 3V 2(PO4 3 K 8 K 35,36 Li 3V 2(PO4 3 (1 (2 Li + (3 V 3+ DSC Li 3V 2(PO4 3DSC Li 3V 2(PO4 3 LiFePO 4 Li 3V 2(PO4 3 38 LiFePO 4 LiFePO 4 2 LiFePO 4LiFePO 4 / LiFePO 4 c LiFePO 4 LiCoO 2

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20、g1, Zhu Rongsun1, Hu Xinguo2 (1. Anhui University of Technology, Maanshan 243002, China (2. Harbin Institute of Technology, Harbin 150001, China Abstract: LiMn2O4 and LiMPO4 can be used as cathode materials of power battery by judging the security of power lithium ion battery cathode material. Recent progresses on LiMn2O4 and LiMPO4 ca