Abstract: <SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: 宋体; mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times>Lithium-ion batteries with LiFePO</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: 宋体; mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times><SUB>4</SUB> as cathode material will gradually replace the existing lead-acid batteries and will be the research focus in the field of electrokinetic lithium-ion batteries due to its excellent features,such as extra safety,environmental protection,cheap price,long life,and high capacity.Research progress in preparation of LiFePO</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: 宋体; mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times><SUB>4</SUB> material with liqiud phase co-precipitation methods,including all-liquid phase co-precipitation method and semi-liquid phase co-precipitation method,was systematically introduced while briefly describing several conventional synthetic methods at the same time.It was pointed out that though the process of all-liquid phase method was simple and short,sedimentation rates of components in solution system were different,which might lead to deviation of composition and loss of uniformity;Whereas,although there was some increase in the process of semiliquid phase method,the formation of phosphorous-iron complex salt could be controlled by controlling pH and dropping rate etc.,and thus it will make the product in spherical shape,which will be conductive to improve the tap density of LiFePO</SPAN><SPAN lang=EN-US style="FONT-SIZE: 10.5pt; FONT-FAMILY: " AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: 宋体; mso-fareast-font-family: 12.0pt; mso-bidi-font-size: Roman?; New Times><SUB>4</SUB>.<SPAN style="mso-spacerun: yes">&nbsp; </SPAN></SPAN>