水热法制备磷酸铁锂正极材料研究-开题报告正式版.doc

1gdp10%2lifepo4 2009118633 3.1lifepo4pmnblifepo4feo6po4pfelifelifeo6 feo6 po4 po4 feo6 lio6 ( 3. 6 g/ cm3 )fe2+/fe3+ 3. 4 v170mah /gp2o2m lifepo4fepo43.2 100t. takeuchi1liohfeso4nh4h2po42205hna2so36005minlifepo4/c3.3 ()licoo2linio2 lmin2o4 3lifepo4 -2 l ifepo4 3. 1 3. 1. 1 2(fe(ch3coo)2fec2o4 )(li2co3lioh ) 4710216 ( 300 e )5 10 h(550750)1020 hlifepo4padhi4li2co3fe(ch3coo)2nh4h2po4lifepo4110 ma h /gtakahash i 5liohh2ofec2o42h2o( nh4 ) 2hpo4675725800prosin i 6lico3fec2o42h2o( (nh4 ) 2hpo4 lifepo4125mah /g3. 1. 2 lifepo4mich7 fepo44h2olioh h2o500 800 10 h0. 1 c0. 5 c160mah/g146. 5mah/g8feso47h2onh4h2po4fepo4li2 co3ar500560600700800 12 hlifepo4560600700800lifepo4/clifepo45600. 1 c151 mah/g (0.1 c) 1c129 mah/g3. 1. 3 9 li2co3 ( fec2o4h2o)( (nh4 ) 2hpo4 )lifepo4( fec2o4 ? h2o)fe2+ lifepo414min0.25c96ma? h/g3. 1. 4 iriyama10lifepo4ar80024 hlifepo410090%sauvage11lifepo43. 2 3. 2. 1 -lifepo4liohh3 po4ph60lifepo412 lifepo4croce13 fe (no3 ) 3h3 po4lioh 1% cuag-lifepo40.2c140ma? h/g25ma? h/g-143. 2. 2 15 16 lioh ? h2ofeso4 ?7h2oh3 po4(2w%t )1804h100e1202 h15%n26002 hlifepo4/c300. 2c1c5c157152136ma? h/g355 c3. 2. 3 15(lifepo4)(lifepo4/c)16feso47h2o ()nh4h2po4li2co3nh4fepo4 ? h2o8%70018 hlifepo417mg2+ al3+ ti4+ v5 + ni2+ lifepo4li12xtixfepo4li12xvxfepo4li12xnixfepo42c120mah /g2080%3. 2. 4 183. 2. 5 myung19lino3fe(no3) 3(nh4)2hpo4(tween85)(170180)300400ar75010-4s/cm11c90 mah/g203. 2. 6 ( 450650)li2co3fec2o4nh4h2po4lifepo4/c6009003. 3 lifepo4fepo4-3.4 lifepo4lifepo444.11xrdsem23 4.212344.3lifepo4po4 lilifepo4feo6 fe-o-felifepo421lifepo4lifepo41lifepo4li+li+lifepo42lifepo4lifepo4lifepo4lifepo43lifepo4lifepo4(200 nm) 22a yamada23lifepo4lifepo40.3 evlifepo4lifepo4lifepo4fepo4fe-o fepo4lifepo4lifeplifepo4/lifepo4limgaltinbwzrfe mncrcumgcoplifeplifepo4lili0.05femn3 + pplifepo4241%lifepo4lifepo45 120111124:2201111262012113(5-10)3201221322442012227513 52012514256201252661720126467620125257mikrounachiland 2001a/8/ 1 ,.j.,2009,37(4): 3-14.2 shuklaak. kumar t p. materials for next-generation lithium batteriesj. currentscience,2008,94(3):314-3313 ,.j.,2009,41(3):5-84 padhi a knanjundaswamy k s,goodenough jb.phospho-olivines aspositive electrode materials for rechargeablelithium batteriesj.electrochemical soc,1997,144(4):1l88-l1945 chiu k f, chen p y. structural evolution and electrochemical performance oflifepo4/c thin films deposited by ionized magnetron sputteringj.surface & coatings technology,2008,203: 872-8756 yamada a,chung s c, hinokuma k. optimized lifepo4 for lithium batterycathodesj.j electrochem soc,2001,148(3): 224-2297 ,.j.,2004,34(4):74-778 tajimi s,ikeda y,uematsu k,et al.enhanced electrochemical,performance of fepo4prepared by hydrothermal reaction j.solid state ionics,2004,175(1/4):287-2909 liu j l,jiang r r,wang x y, et al. the defect chemistry of lifepo4 prepared byhydrothermal method at differendifferent ph valuesj. journal of power sources, 2009,194(1): 536-54010 croce f, epifanio a d, hassoun j, et al. a novel concept for the synthesis of animproved lifepo4 lithium battery cathode j. electrochem solid-state lett, 2002, 5(3): 47-5011 hsu k f,tsay s y, hwang b.synthesis and charaeterization of nano-sized lifepo4cathode materials prepared by a citric acid-based sol-gel route j.journal of materials chemistry,2004,14 (17):2690-269512 ,.- lifepo4/cj., 2008, 18(3):546-55013 arnold g , garche j, hemmer r ,et a1. fine-particle lithiumiron phosphatelifepo4 synthesized by a new low-cost aqueous precipitation techniquej. j power sources,2003,119: 247-25114 , , ,.j.,2008,40(1): 22-2515 barker j, saidim y, swoyer j l. lithium iron (ii) phosphoolivines prepared by anovel carbothermal reduction method j.electrochem solid-state lett, 2003, 6(3): 53-5516 ,.j.,2009,33(8): 658-66117 . j. 200840( 2 )132618 takahashimtob ish ima stak eiket a.l react ion behav ior of lifepo4as the cathodematerials for rechargeab le lith ium batteriesj. solid sta te ionics2002148(324) 28329.19 prosin i p plisimzane det a.l determ ination of the chemical d iffus ion coefficientof lith ium in lifepo4j. solid state ionics20021483517223.20 michhcao g szhzhao x b. low2costone2step process for syn th es is ofcarbon2coated lifepo4cathodej. ma teria lsletters200559127230.21 . j. 200616 (8)144529.22 . lifepo4j. 200529 (6)3462823 iriyama yyokoyama myada c. et a.l preparation of lifepo4th in films by pu lsedlaser depos it ion and th eir electro