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000864400 1001_ $$0P:(DE-Juel1)168420$$aWu, Xiaochao$$b0$$eCorresponding author
000864400 245__ $$aInvestigation of the Li-Co antisite exchange in Fe-substitued LiCoPO4 cathode for high-voltage lithium ion batteries
000864400 260__ $$aAmsterdam$$bElsevier$$c2019
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000864400 520__ $$aCarbon coated olivine Pnma LiCoPO4 (LCP/C) and Fe-substituted LiCo0.8Fe0.2PO4 (LCFP/C) were synthesized by a solvothermal method and their structural features and electrochemical properties were investigated. The electrochemical performance of LCFP/C is better than that of LCP/C, owing to the partial substitution of Co by Fe which effectively suppresses the increasement of antisite exchange between Li+ and Co2+ ions within the structure during cycling, despite a similar amount of Li–Co antisite exchange in pristine LCP/C and LCFP/C samples. Furthermore, direct visualization of Co in Li sites in the pristine samples and after 50 cycles was achieved through high-resolution scanning transmission electron microscopy for both LCP/C and LCFP/C. It was found that LCP/C locally formed a new cation-ordered structure after cycling due to the Li–Co antisite exchange, while the structure of LCFP/C remains almost the same. This study provides direct evidence that Fe substitution reduced the Li–Co exchange and improved the electrochemical cycling life of the LiCoPO4 cathode for high-voltage lithium ion batteries.
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000864400 7001_ $$0P:(DE-Juel1)174171$$aMeledina, Maria$$b1
000864400 7001_ $$0P:(DE-Juel1)130525$$aBarthel, Juri$$b2
000864400 7001_ $$0P:(DE-Juel1)172733$$aLiu, Zigeng$$b3
000864400 7001_ $$0P:(DE-Juel1)161208$$aTempel, Hermann$$b4
000864400 7001_ $$0P:(DE-Juel1)157700$$aKungl, Hans$$b5
000864400 7001_ $$0P:(DE-Juel1)130824$$aMayer, Joachim$$b6
000864400 7001_ $$0P:(DE-Juel1)156123$$aEichel, Rüdiger-A.$$b7
000864400 773__ $$0PERI:(DE-600)2841602-8$$a10.1016/j.ensm.2019.07.004$$gVol. 22, p. 138 - 146$$p138 - 146$$tEnergy storage materials$$v22$$x2405-8297$$y2019
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