Physical and electrochemical properties of LiCoPO4/C nanocomposites prepared by a combination of emulsion drip combustion and wet ball-milling followed by heat treatment

Tussupbayev, Renat; Taniguchi, Izumi

doi:10.1016/j.jpowsour.2013.01.185

Cited by 20 publications

(7 citation statements)

References 24 publications

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“…Like in the case of the other olivine compounds, the problem of low conductivity can be solved by decreasing the size of the particles [212][213][214][215] and optimizing the carbon coating [216][217][218][219]. The presence of carbon in the grinding media is not sufficient [220].…”

Section: Licopo4mentioning

confidence: 99%

Olivine Positive Electrodes for Li-Ion Batteries: Status and Perspectives

Mauger

Julien

2018

Batteries

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Among the compounds of the olivine family, LiMPO 4 with M = Fe, Mn, Ni, or Co, only LiFePO 4 is currently used as the active element of positive electrodes in lithium-ion batteries. However, intensive research devoted to other elements of the family has recently been successful in significantly improving their electrochemical performance, so that some of them are now promising for application in the battery industry and outperform LiFePO 4 in terms of energy density, a key parameter for use in electric vehicles in particular. The purpose of this review is to acknowledge the current state of the art and the progress that has been made recently on all the elements of the family and their solid solutions. We also discuss the results from the perspective of their potential application in the industry of Li-ion batteries.The main disadvantage of olivines with respect to other cathode chemistries for lithium batteries is the lower energy density. This is evidenced in Table 1 where we have reported the gravimetric and volumetric energy densities of LFP and two other cathode materials which have also found a market place in commercial batteries for electric vehicles: the manganese spinel LiMn 2 O 4 , and "LiNiCoAl" (NCA). In terms of energy density, the winner is clearly NCA, the cathode material used by Panasonic to manufacture the batteries of Tesla cars. However, the low energy density of LFP was not an obstacle for its success for EV applications. The top-selling EV manufacturer in the world today is BYD, which makes its own batteries. Its success comes from its choice of the LFP cathode chemistry. As an example, BYD's LFP battery used by e6 taxis in Shenzen has a driving range of 200 km and can be charged to 80% in just 20 min, or 100% in only 40 min using a BYD DC fast charger. The town has 12,000 taxis which will be electric by the end of this year, and all of the 7,000,000 buses are already electric buses, 80% being BYD buses.

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Section: Licopo4mentioning

confidence: 99%

Olivine Positive Electrodes for Li-Ion Batteries: Status and Perspectives

Mauger

Julien

2018

Batteries

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“…100 Moreover, they reported in a more recent study, 101 based on in situ XRD, the appearance of a third phase during the delithiation of LiCoPO 4 which found to crystallize in the same pristine structure. Many attempts to improve the electrochemical performances were reported such as, modifying the synthesis method, 102,103 carbon coating, [104][105][106][107][108][109][110] and cation doping. [111][112][113][114][115] Particularly, in the last decade, LiCoPO 4 , the potential high energy Li-ion cathode (∼800 Wh kg −1 ) has gained more attention.…”

Section: Olivine Family Of Phosphates (Limpo 4 M = Co Mn Ni)mentioning

confidence: 99%

The origin of fast‐charging lithium iron phosphate for batteries

Hadouchi

Koketsu

et al. 2022

Battery Energy

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Since the report of electrochemical activity of LiFePO4 from Goodenough's group in 1997, it has attracted considerable attention as cathode material of choice for lithium‐ion batteries. It shows excellent performance such as the high‐rate capability, long cyclability, and improved safety. Furthermore, the raw materials cost of LiFePO4 are lower and abundant compared with conventional Li‐ion battery oxides compounds. The lithium extraction from LiFePO4 operates as biphase mechanism accompanied by a relatively large volume change of ∼6.8%, even though, nanosized LiFePO4 shows exceptionally high‐rate capability during cycling. In the aim to explain this remarkable feature, recent reports using cutting‐edge techniques, such as in situ high‐resolution synchrotron X‐ray diffraction, explained that the origin of the observed high‐rate performance in nanosized LiFePO4 is the absence of phase separation during battery operation at high current densities. In this review, the importance of understanding lithium insertion mechanisms towards explaining the significantly fast‐charging performance of LiFePO4 electrode is highlighted. In particular, phase separation mechanisms, are unclear and deserve considerable attention. Several proposed models for Li diffusion and phase separation in LiFePO4 are summarized. In addition, the crystallographic aspects, defect structures of LiFePO4 are also reviewed. Finally, the status of development of other olivine‐type LiMPO4 (M = Co, Mn, and Ni) are summarized.

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“…The need for improving electrolyte stability, given the high operating potential of LiCoPO 4 , imposes surface treatment by a coating of Al 2 O 3 or LiFePO 4 (Eftekhari, 2004;Jang et al, 2010), or a switch to new classes of electrolytes, as for LiNi 0.5 Mn 1.5 O 4 . As a matter of fact, so far, no stable cycling close to theoretical capacity has been reached, even though its incorporation into carbon composites could in some cases improve the cycling performance (Tussupbayev and Taniguchi, 2013) by supporting both electronic conductivity and protecting the surface of material from direct contact with electrolyte. While the operating voltage is challenging for carbonate mixtures, the degradation of the olivine structure by HF upon delithiation could be involved in the capacity fading, as improved results have been obtained when an HF scavenger, such as SiO 2 , is incorporated in the system (Sharabi et al, 2011). 7.3.2 "Lithium-rich" cathode layered composites xLi 2 MnO 3 (1Àx)LiMO 2 (M ¼ Co, Ni, Mn)…”

Section: Licopomentioning

confidence: 99%