Influence of Ti doping on microstructure and electrochemical performance of LiNi0.5Mn1.5O4 cathode material for lithium-ion batteries

Zong, Bo; Lang, Yaqiang; Yan, Shuhao; Deng, Ziyao; Gong, Jiajia; Guo, Jianling; Wang, Li; Liang, Guangchuan

doi:10.1016/j.mtcomm.2020.101003

Cited by 34 publications

(16 citation statements)

References 53 publications

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“…Thus far, many single doping elements, including metals and non‐metals, e.g., Cr, [ 287 ] Fe, [ 288 ] Al, [ 289 ] Ru, [ 94 ] Na, [ 290 ] Ti, [ 291 ] Si, [ 292 ] Mg, [ 293 ] F, [ 181 ] and P [ 294 ] and double and even triple dopants, such as Mg and F co‐doping, [ 295 ] Mg and Si co‐doping, [ 296 ] and Cu, Al and Ti triple doping [ 297 ] have been reported. For example, a good cycling stability can be achieved for LiNi 0.45 Cr 0.05 Mn 1.5 O 4 with a designed controlling of Mn 3+ concentration.…”

Section: Promising Candidates Of Cobalt‐free Lithium‐ion Cathodesmentioning

confidence: 99%

Cobalt‐Free Cathode Materials: Families and their Prospects

Zhao

Lam

Sheng

et al. 2022

Advanced Energy Materials

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117

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With the rapid growth of global electro‐mobility, the demand for cobalt is rapidly increasing because it is currently an indispensable component of the cathode materials in lithium‐ion batteries (LIBs). However, the use of Co raises moral issues caused by its exploitation and the geographic limitations of Co resources may result in risking the supply of LIBs. Thus, the development of cobalt‐free (Co‐free) cathodes has become a focus in the LIBs industry. Currently, Co‐free cathodes of lithium‐rich oxides, nickel‐rich layered oxides and spinel lithium nickel manganese oxide (LNMO) are promising candidates but face severe problems. This review article is the first to synthesize and present the progress of Co‐free cathodes made with Li‐rich oxides, Ni‐rich layered oxides and spinel LNMO, identifying their performance, problems and potential development trends. In particular, the roles of cobalt are further clarified, and the full‐cell performance and related commercialization prospects of the three above‐mentioned Co‐free cathodes are also objectively assessed. The focus of this work is to distill detailed and timely insights from the corresponding research progress on these materials and to demonstrate the associated urgency, challenges and opportunities in this field, thus facilitating a faster industrialization of Co‐free cathodes.

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Section: Promising Candidates Of Cobalt‐free Lithium‐ion Cathodesmentioning

confidence: 99%

Cobalt‐Free Cathode Materials: Families and their Prospects

Zhao

Lam

Sheng

et al. 2022

Advanced Energy Materials

Self Cite

117

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“…doped will form a certain coating layer at a certain temperature (As shown in Figure 9A,B). 102,119,120 More importantly, some doping elements (B, Nb, Sb, etc.) will change the surface energy of the corresponding crystal face (such as [003] crystal planes, [104] crystal planes) in the high-temperature process, resulting in change the primary grain orientation or expose crystal face, and finally reduce the lithium ion diffusion resistance and anisotropic lattice expansion/ contraction, thereby improving electrochemical performance (Figure 9C).…”

Section: The Role Of Doping Impactsmentioning

confidence: 99%

“…Reproduced with permission: copyright 2018, American Chemical Society. 119 (C) Ni-rich cathodes modified by B, Nb, Sn, and the electrochemical performance. Reproduced with permission: copyright 2021, Elsevier.…”

Section: Ni-rich Single Crystal Cathode Materialsmentioning

confidence: 99%

Recent advance in structure regulation of high‐capacity Ni‐rich layered oxide cathodes

Qiu

Zhang

Song

et al. 2021

EcoMat

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High-capacity layered oxide Ni-rich cathodes are attractive to enhance the driving-range of electric vehicles because of its preferential costs. Nevertheless, in Ni-rich cathodes, there are still many issues such as microcracks generation along grain boundaries and interface side reaction between active substance and electrolyte, resulting in the rapidly deterioration of electrochemical property. Herein, improving the performance of Ni-based cathodes by structural regulation is summarized. The remaining challenges and outlook are discussed as well.

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“…For example, Li + and Na + ions have been incorporated into the Li site to synthesize Li 1+ x Ni 0.5 Mn 1.5 O 4 and Li 1− x Na x Ni 0.5 Mn 1.5 O 4 materials [ 7 , 8 , 9 ]. For Ni and Mn sites, metal and non-metal cations, such as Al 3+ [ 10 ], Cu 2+ [ 11 ], Y 3+ [ 12 ], Co 3+ [ 13 ], Cr 3+ [ 14 ], Zr 4+ [ 15 ], P 5+ [ 16 ], B 3+ [ 17 ], Ti 4+ [ 18 ], and V 5+ [ 19 ], have been introduced by various synthesis methods. For the O site, F − [ 20 ] and Cl − [ 21 ] ions have been used to replace the oxygen.…”

Section: Introductionmentioning

confidence: 99%

Enhanced Electrochemical Performance of LiNi0.5Mn1.5O4 Composite Cathodes for Lithium-Ion Batteries by Selective Doping of K+/Cl− and K+/F−

Wei

et al. 2021

Nanomaterials

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K+/Cl− and K+/F− co-doped LiNi0.5Mn1.5O4 (LNMO) materials were successfully synthesized via a solid-state method. Structural characterization revealed that both K+/Cl− and K+/F− co-doping reduced the LixNi1−xO impurities and enlarged the lattice parameters compared to those of pure LNMO. Besides this, the K+/F− co-doping decreased the Mn3+ ion content, which could inhibit the Jahn–Teller distortion and was beneficial to the cycling performance. Furthermore, both the K+/Cl− and the K+/F− co-doping reduced the particle size and made the particles more uniform. The K+/Cl− co-doped particles possessed a similar octahedral structure to that of pure LNMO. In contrast, as the K+/F− co-doping amount increased, the crystal structure became a truncated octahedral shape. The Li+ diffusion coefficient calculated from the CV tests showed that both K+/Cl− and K+/F− co-doping facilitated Li+ diffusion in the LNMO. The impedance tests showed that the charge transfer resistances were reduced by the co-doping. These results indicated that both the K+/Cl− and the K+/F− co-doping stabilized the crystal structures, facilitated Li+ diffusion, modified the particle morphologies, and increased the electrochemical kinetics. Benefiting from the unique advantages of the co-doping, the K+/Cl− and K+/F− co-doped samples exhibited improved rate and cycling performances. The K+/Cl− co-doped Li0.97K0.03Ni0.5Mn1.5O3.97Cl0.03 (LNMO-KCl0.03) exhibited the best rate capability with discharge capacities of 116.1, 109.3, and 93.9 mAh g−1 at high C-rates of 5C, 7C, and 10C, respectively. Moreover, the K+/F− co-doped Li0.98K0.02Ni0.5Mn1.5O3.98F0.02 (LNMO-KF0.02) delivered excellent cycling stability, maintaining 85.8% of its initial discharge capacity after circulation for 500 cycles at 5C. Therefore, the K+/Cl− or K+/F− co-doping strategy proposed herein will play a significant role in the further construction of other high-voltage cathodes for high-energy LIBs.

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Influence of Ti doping on microstructure and electrochemical performance of LiNi0.5Mn1.5O4 cathode material for lithium-ion batteries

Cited by 34 publications

References 53 publications

Cobalt‐Free Cathode Materials: Families and their Prospects

Cobalt‐Free Cathode Materials: Families and their Prospects

Recent advance in structure regulation of high‐capacity Ni‐rich layered oxide cathodes

Enhanced Electrochemical Performance of LiNi0.5Mn1.5O4 Composite Cathodes for Lithium-Ion Batteries by Selective Doping of K+/Cl− and K+/F−

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