Synthesis and enhanced electrochemical performance of the honeycomb TiO2/LiMn2O4 cathode materials

Zhang, Jiayan; Shen, Jianxing; Wei, Changbao; Tao, Haizheng; Yue, Yuanzheng

doi:10.1007/s10008-016-3197-4

Cited by 3 publications

(3 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The effect of morphology on capacity fading and Mn dissolution has been shown by several researchers. [109][110][111][112] Multi-shelled LMO hollow microspheres synthesized by hard template method were shown to have excellent cycling stability as shown in Fig. 41.…”

Section: Prevention Of Mn-dissolutionmentioning

confidence: 99%

See 1 more Smart Citation

Review—Manganese Dissolution from Spinel Cathode: Few Unanswered Questions

Bhandari

Bhattacharya

2016

J. Electrochem. Soc.

113

View full text Add to dashboard Cite

The choice of cathode material critically influences the performance, cost and energy density in a Li ion battery. LiMn 2 O 4 (LMO) cathode is an attractive cathode material because of its high rate capability, low cost, safety and non-toxicity. However, low cycle life or capacity fading with cycling is a big hurdle in the practical application of LMO cathodes. The dominant cause of the capacity fading, Mn dissolution from LMO, is still a challenge to overcome. In this review, we attempt to emphasize the loopholes in the understanding related to the Mn dissolution phenomenon in LMO cathodes in the presence of both aqueous and non-aqueous electrolytes. The underlying mechanism behind the dissolution process is often explained with the help of ionic charge disproportionation argument. Nevertheless, there are experimental and theoretical evidence in the literature to counter the simplistic view of dissolution due to charge disproportionation. Moreover, the correlation between the metal dissolution and the capacity fading is not causally established yet in the literature which hinders the formulation for a systematic strategy to prevent the capacity loss. In the current article we discuss all the relevant investigations related to the understanding of the cause, effect and prevention strategies of Mn-dissolution. We attempt to point out the gaps and contradictions in the literature and motivate further targeted studies in this seminally important material for better Li-ion batteries having higher rate capability and capacity retention.

show abstract

Section: Prevention Of Mn-dissolutionmentioning

confidence: 99%

“…43. 112 The particular morphology, porous structure a the ordered distribution of Ti 4+ in the structure causes improved structural stability and the less Mn 2+ dissolution.…”

Section: Prevention Of Mn-dissolutionmentioning

confidence: 99%

Review—Manganese Dissolution from Spinel Cathode: Few Unanswered Questions

Bhandari

Bhattacharya

2016

J. Electrochem. Soc.

113

View full text Add to dashboard Cite

show abstract

“…In addition, modifying the microstructure of spinel LMO by controlling the size or distribution of the particles can also improve its electrochemical properties [9][10][11][12][13]. Several factors can reduce the cycle life of LMO cathodes: LMO cathodes can be sensitive to high operating voltages, temperatures, and use poor quality materials or manufacturing processes [14][15][16]. Therefore, the first priority is to produce LMO of high purity with uniform particle and size distribution to improve the structure and morphology of the LMO cathode, owing to which the electrochemical performance can be improved [17,18].…”

Section: Introductionmentioning

confidence: 99%

Unraveling the Mechanism and Practical Implications of the Sol-Gel Synthesis of Spinel LiMn2O4 as a Cathode Material for Li-Ion Batteries: Critical Effects of Cation Distribution at the Matrix Level

et al. 2023

View full text Add to dashboard Cite

Spinel LiMn2O4 (LMO) is a state-of-the-art cathode material for Li-ion batteries. However, the operating voltage and battery life of spinel LMO needs to be improved for application in various modern technologies. Modifying the composition of the spinel LMO material alters its electronic structure, thereby increasing its operating voltage. Additionally, modifying the microstructure of the spinel LMO by controlling the size and distribution of the particles can improve its electrochemical properties. In this study, we elucidate the sol-gel synthesis mechanisms of two common types of sol-gels (modified and unmodified metal complexes)—chelate gel and organic polymeric gel—and investigate their structural and morphological properties and electrochemical performances. This study highlights that uniform distribution of cations during sol-gel formation is important for the growth of LMO crystals. Furthermore, a homogeneous multicomponent sol-gel, necessary to ensure that no conflicting morphologies and structures would degrade the electrochemical performances, can be obtained when the sol-gel has a polymer-like structure and uniformly bound ions; this can be achieved by using additional multifunctional reagents, namely cross-linkers.

show abstract